diff --git a/koha-tmpl/intranet-tmpl/prog/en/xslt/NORMARCslim2intranetDetail.xsl b/koha-tmpl/intranet-tmpl/prog/en/xslt/NORMARCslim2intranetDetail.xsl
index bf4af4b931..874f46ab98 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/xslt/NORMARCslim2intranetDetail.xsl
+++ b/koha-tmpl/intranet-tmpl/prog/en/xslt/NORMARCslim2intranetDetail.xsl
@@ -7,7 +7,8 @@
   xmlns:marc="http://www.loc.gov/MARC21/slim"
   xmlns:items="http://www.koha-community.org/items"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-  exclude-result-prefixes="marc items">
+  xmlns:str="http://exslt.org/strings"
+  exclude-result-prefixes="marc items str">
     <xsl:import href="NORMARCslimUtils.xsl"/>
     <xsl:output method = "html" indent="yes" omit-xml-declaration = "yes" encoding="UTF-8"/>
     <xsl:template match="/">
@@ -108,7 +109,7 @@
                 <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=an:<xsl:value-of select="marc:subfield[@code=9]"/></xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
-            <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=au:<xsl:value-of select="marc:subfield[@code='a']"/></xsl:attribute>
+            <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=au:<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/></xsl:attribute>
             </xsl:otherwise>
         </xsl:choose>
         <xsl:call-template name="nameABCDQ"/></a>
@@ -123,7 +124,7 @@
                 <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=an:<xsl:value-of select="marc:subfield[@code=9]"/></xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
-            <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=au:<xsl:value-of select="marc:subfield[@code='a']"/></xsl:attribute>      
+            <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=au:<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/></xsl:attribute>
             </xsl:otherwise>
         </xsl:choose>
         <xsl:call-template name="nameABCDN"/></a>
@@ -137,7 +138,7 @@
                 <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=an:<xsl:value-of select="marc:subfield[@code=9]"/></xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
-            <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=au:<xsl:value-of select="marc:subfield[@code='a']"/></xsl:attribute>
+            <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=au:<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/></xsl:attribute>
             </xsl:otherwise>
         </xsl:choose>
         <xsl:call-template name="nameACDEQ"/></a>
@@ -170,8 +171,9 @@
         <xsl:if test="marc:datafield[@tag=440 or @tag=490]">
 	        <span class="results_summary"><span class="label">Series: </span>
 	        <xsl:for-each select="marc:datafield[@tag=440]">
-	             <a href="/cgi-bin/koha/catalogue/search.pl?q=se:{marc:subfield[@code='a']}">
-	            <xsl:call-template name="chopPunctuation">
+	            <a>
+                    <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=se:<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/></xsl:attribute>
+	                <xsl:call-template name="chopPunctuation">
 	                            <xsl:with-param name="chopString">
 	                                <xsl:call-template name="subfieldSelect">
 	                                    <xsl:with-param name="codes">av</xsl:with-param>
@@ -184,7 +186,8 @@
 	        </xsl:for-each>
 	
 	        <xsl:for-each select="marc:datafield[@tag=490][@ind1=0]">
-	             <a href="/cgi-bin/koha/catalogue/search.pl?q=se:{marc:subfield[@code='a']}">
+	            <a>
+                    <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=se:<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/></xsl:attribute>
 	                        <xsl:call-template name="chopPunctuation">
 	                            <xsl:with-param name="chopString">
 	                                <xsl:call-template name="subfieldSelect">
@@ -205,10 +208,10 @@
             <a>
             <xsl:choose>
             <xsl:when test="$UseControlNumber = '1' and marc:controlfield[@tag=001]">
-                <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=rcn:<xsl:value-of select="marc:controlfield[@tag=001]"/>+and+(bib-level:a+or+bib-level:b)</xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=rcn:<xsl:value-of select="str:encode-uri(marc:controlfield[@tag=001], true())"/>+and+(bib-level:a+or+bib-level:b)</xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
-                <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=Host-item:<xsl:value-of select="translate(marc:datafield[@tag=245]/marc:subfield[@code='a'], '/', '')"/></xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=Host-item:<xsl:value-of select="str:encode-uri(translate(marc:datafield[@tag=245]/marc:subfield[@code='a'], '/', ''), true())"/></xsl:attribute>
             </xsl:otherwise>
             </xsl:choose>
             <xsl:text>Show analytics</xsl:text>
@@ -250,7 +253,7 @@
                     </a>
                 </xsl:when>
                 <xsl:otherwise>
-                    <a><xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=ti,phr:<xsl:value-of select="translate($f773, '()', '')"/></xsl:attribute>
+                    <a><xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=ti,phr:<xsl:value-of select="str:encode-uri(translate($f773, '()', ''), true())"/></xsl:attribute>
                         <xsl:value-of select="$f773"/>
                     </a>
                     <xsl:if test="marc:subfield[@code='g']"><xsl:text> </xsl:text><xsl:value-of select="marc:subfield[@code='g']"/></xsl:if>
@@ -418,7 +421,7 @@
                 </xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
-                <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=su<xsl:value-of select="$SubjectModifier"/>:<xsl:value-of select="$TracingQuotesLeft"/><xsl:value-of select="marc:subfield[@code='a']"/><xsl:value-of select="$TracingQuotesRight"/></xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=su<xsl:value-of select="$SubjectModifier"/>:<xsl:value-of select="$TracingQuotesLeft"/><xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/><xsl:value-of select="$TracingQuotesRight"/></xsl:attribute>
             </xsl:otherwise>
             </xsl:choose>
             <xsl:call-template name="chopPunctuation">
@@ -537,7 +540,7 @@
                         <xsl:with-param name="codes">a_t</xsl:with-param>
                     </xsl:call-template>
                 </xsl:variable>
-             <a><xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=<xsl:value-of select="translate($f780, '()', '')"/></xsl:attribute>
+             <a><xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=<xsl:value-of select="str:encode-uri(translate($f780, '()', ''), true())"/></xsl:attribute>
                 <xsl:value-of select="translate($f780, '()', '')"/>
             </a>
         </span>
@@ -588,7 +591,7 @@
                     </xsl:call-template>
                 </xsl:variable>
 
-                <a><xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=<xsl:value-of select="translate($f785, '()', '')"/></xsl:attribute>
+                <a><xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=<xsl:value-of select="str:encode-uri(translate($f785, '()', ''), true())"/></xsl:attribute>
                 <xsl:value-of select="translate($f785, '()', '')"/>
             </a>
 
diff --git a/koha-tmpl/intranet-tmpl/prog/en/xslt/NORMARCslim2intranetResults.xsl b/koha-tmpl/intranet-tmpl/prog/en/xslt/NORMARCslim2intranetResults.xsl
index 3bcdd8bd22..9fff0a01ed 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/xslt/NORMARCslim2intranetResults.xsl
+++ b/koha-tmpl/intranet-tmpl/prog/en/xslt/NORMARCslim2intranetResults.xsl
@@ -5,7 +5,8 @@
   xmlns:marc="http://www.loc.gov/MARC21/slim"
   xmlns:items="http://www.koha-community.org/items"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-  exclude-result-prefixes="marc items">
+  xmlns:str="http://exslt.org/strings"
+  exclude-result-prefixes="marc items str">
     <xsl:import href="NORMARCslimUtils.xsl"/>
     <xsl:output method = "html" indent="yes" omit-xml-declaration = "yes" encoding="UTF-8"/>
     <xsl:key name="item-by-status" match="items:item" use="items:status"/>
@@ -308,7 +309,7 @@
             <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=an:<xsl:value-of select="marc:subfield[@code=9]"/></xsl:attribute>
         </xsl:when>
         <xsl:otherwise>
-        <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=au:"<xsl:value-of select="marc:subfield[@code='a']"/>"</xsl:attribute>
+        <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=au:"<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/>"</xsl:attribute>
         </xsl:otherwise>
     </xsl:choose>
     <xsl:call-template name="nameABCDQ"/></a>
@@ -323,7 +324,7 @@
             <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=an:<xsl:value-of select="marc:subfield[@code=9]"/></xsl:attribute>
         </xsl:when>
         <xsl:otherwise>
-        <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=au:"<xsl:value-of select="marc:subfield[@code='a']"/>"</xsl:attribute>
+        <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=au:"<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/>"</xsl:attribute>
         </xsl:otherwise>
     </xsl:choose>
     <xsl:call-template name="nameABCDN"/></a>
@@ -345,7 +346,7 @@
             <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=an:<xsl:value-of select="marc:subfield[@code=9]"/></xsl:attribute>
         </xsl:when>
         <xsl:otherwise>
-        <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=au:"<xsl:value-of select="marc:subfield[@code='a']"/>"</xsl:attribute>
+        <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=au:"<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/>"</xsl:attribute>
         </xsl:otherwise>
     </xsl:choose>
     <xsl:call-template name="nameACDEQ"/></a>
@@ -407,10 +408,10 @@
             <a>
             <xsl:choose>
             <xsl:when test="$UseControlNumber = '1' and marc:controlfield[@tag=001]">
-                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=rcn:<xsl:value-of select="marc:controlfield[@tag=001]"/>+and+(bib-level:a+or+bib-level:b)</xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=rcn:<xsl:value-of select="str:encode-uri(marc:controlfield[@tag=001], true())"/>+and+(bib-level:a+or+bib-level:b)</xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
-                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=Host-item:<xsl:value-of select="translate(marc:datafield[@tag=245]/marc:subfield[@code='a'], '/', '')"/></xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=Host-item:<xsl:value-of select="str:encode-uri(translate(marc:datafield[@tag=245]/marc:subfield[@code='a'], '/', ''), true())"/></xsl:attribute>
             </xsl:otherwise>
             </xsl:choose>
             <xsl:text>Show analytics</xsl:text>
@@ -452,10 +453,10 @@
                     </a>
                 </xsl:when>
                 <xsl:otherwise>
-                    <a><xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=ti,phr:<xsl:value-of select="translate($f773, '()', '')"/></xsl:attribute>
+                    <a><xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=ti,phr:<xsl:value-of select="str:encode-uri(translate($f773, '()', ''), true())"/></xsl:attribute>
                         <xsl:value-of select="$f773"/>
                     </a>
-                    <xsl:if test="marc:subfield[@code='g']"><xsl:text> </xsl:text><xsl:value-of select="marc:subfield[@code='g']"/></xsl:if>
+                    <xsl:if test="marc:subfield[@code='g']"><xsl:text> </xsl:text><xsl:value-of select="str:encode-uri(marc:subfield[@code='g'], true())"/></xsl:if>
                 </xsl:otherwise>
             </xsl:choose>
         </span>
diff --git a/koha-tmpl/intranet-tmpl/prog/en/xslt/NORMARCslimUtils.xsl b/koha-tmpl/intranet-tmpl/prog/en/xslt/NORMARCslimUtils.xsl
index 7d1400a2d0..458253de57 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/xslt/NORMARCslimUtils.xsl
+++ b/koha-tmpl/intranet-tmpl/prog/en/xslt/NORMARCslimUtils.xsl
@@ -2,7 +2,10 @@
 
 <!DOCTYPE stylesheet [<!ENTITY nbsp "&#160;" >]>
 
-<xsl:stylesheet version="1.0" xmlns:marc="http://www.loc.gov/MARC21/slim" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<xsl:stylesheet version="1.0"
+  xmlns:marc="http://www.loc.gov/MARC21/slim"
+  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+  xmlns:str="http://exslt.org/strings">
 	<xsl:template name="datafield">
 		<xsl:param name="tag"/>
 		<xsl:param name="ind1"><xsl:text> </xsl:text></xsl:param>
@@ -227,7 +230,7 @@
                         </xsl:when>
                         <xsl:when test="boolean($index)">
                             <a>
-                                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=<xsl:value-of  select="$index"/>:<xsl:value-of  select="marc:subfield[@code='a']"/></xsl:attribute>
+                                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=<xsl:value-of  select="$index"/>:<xsl:value-of  select="str:encode-uri(marc:subfield[@code='a'], true())"/></xsl:attribute>
                                 <xsl:value-of select="$str"/>
                             </a>
                         </xsl:when>
diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/xslt/NORMARCslim2OPACDetail.xsl b/koha-tmpl/opac-tmpl/bootstrap/en/xslt/NORMARCslim2OPACDetail.xsl
index 1f1e26c8dd..917de68fb3 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/xslt/NORMARCslim2OPACDetail.xsl
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/xslt/NORMARCslim2OPACDetail.xsl
@@ -8,7 +8,7 @@
   xmlns:items="http://www.koha-community.org/items"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
   xmlns:str="http://exslt.org/strings"
-  exclude-result-prefixes="marc items">
+  exclude-result-prefixes="marc items str">
     <xsl:import href="NORMARCslimUtils.xsl"/>
     <xsl:output method = "html" indent="yes" omit-xml-declaration = "yes" encoding="UTF-8"/>
     <xsl:template match="/">
@@ -104,7 +104,7 @@
                 <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=an:<xsl:value-of select="marc:subfield[@code=9]"/></xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
-            <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=au:<xsl:value-of select="marc:subfield[@code='a']"/></xsl:attribute>
+            <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=au:<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/></xsl:attribute>
             </xsl:otherwise>
         </xsl:choose>
         <xsl:call-template name="nameABCDQ"/></a>
@@ -130,7 +130,7 @@
                 <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=an:<xsl:value-of select="marc:subfield[@code=9]"/></xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
-            <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=au:<xsl:value-of select="marc:subfield[@code='a']"/></xsl:attribute>
+            <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=au:<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/></xsl:attribute>
             </xsl:otherwise>
         </xsl:choose>
         <xsl:call-template name="nameABCDN"/></a>
@@ -155,7 +155,7 @@
                 <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=an:<xsl:value-of select="marc:subfield[@code=9]"/></xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
-            <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=au:<xsl:value-of select="marc:subfield[@code='a']"/></xsl:attribute>
+            <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=au:<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/></xsl:attribute>
             </xsl:otherwise>
         </xsl:choose>
         <xsl:call-template name="nameACDEQ"/></a>
@@ -200,8 +200,9 @@
         <xsl:if test="marc:datafield[@tag=440 or @tag=490]">
 	        <span class="results_summary"><span class="label">Series: </span>
 	        <xsl:for-each select="marc:datafield[@tag=440]">
-	             <a href="/cgi-bin/koha/opac-search.pl?q=se:{marc:subfield[@code='a']}">
-	            <xsl:call-template name="chopPunctuation">
+	            <a>
+                    <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=se:<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/></xsl:attribute>
+	                <xsl:call-template name="chopPunctuation">
 	                            <xsl:with-param name="chopString">
 	                                <xsl:call-template name="subfieldSelect">
 	                                    <xsl:with-param name="codes">av</xsl:with-param>
@@ -214,7 +215,8 @@
 	        </xsl:for-each>
 
 	        <xsl:for-each select="marc:datafield[@tag=490][@ind1=0]">
-	             <a href="/cgi-bin/koha/opac-search.pl?q=se:{marc:subfield[@code='a']}">
+	            <a>
+                    <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=se:<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/></xsl:attribute>
 	                        <xsl:call-template name="chopPunctuation">
 	                            <xsl:with-param name="chopString">
 	                                <xsl:call-template name="subfieldSelect">
@@ -235,10 +237,10 @@
             <a>
             <xsl:choose>
             <xsl:when test="$UseControlNumber = '1' and marc:controlfield[@tag=001]">
-                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=rcn:<xsl:value-of select="marc:controlfield[@tag=001]"/>+and+(bib-level:a+or+bib-level:b)</xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=rcn:<xsl:value-of select="str:encode-uri(marc:controlfield[@tag=001], true())"/>+and+(bib-level:a+or+bib-level:b)</xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
-                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=Host-item:<xsl:value-of select="translate(marc:datafield[@tag=245]/marc:subfield[@code='a'], '/', '')"/></xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=Host-item:<xsl:value-of select="str:encode-uri(translate(marc:datafield[@tag=245]/marc:subfield[@code='a'], '/', ''), true())"/></xsl:attribute>
             </xsl:otherwise>
             </xsl:choose>
             <xsl:text>Show analytics</xsl:text>
@@ -280,7 +282,7 @@
                     </a>
                 </xsl:when>
                 <xsl:otherwise>
-                    <a><xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=ti,phr:<xsl:value-of select="translate($f773, '()', '')"/></xsl:attribute>
+                    <a><xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=ti,phr:<xsl:value-of select="str:encode-uri(translate($f773, '()', ''), true())"/></xsl:attribute>
                         <xsl:value-of select="$f773"/>
                     </a>
                     <xsl:if test="marc:subfield[@code='g']"><xsl:text> </xsl:text><xsl:value-of select="marc:subfield[@code='g']"/></xsl:if>
@@ -448,7 +450,7 @@
                 </xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
-                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=su<xsl:value-of select="$SubjectModifier"/>:<xsl:value-of select="$TracingQuotesLeft"/><xsl:value-of select="marc:subfield[@code='a']"/><xsl:value-of select="$TracingQuotesRight"/></xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=su<xsl:value-of select="$SubjectModifier"/>:<xsl:value-of select="$TracingQuotesLeft"/><xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/><xsl:value-of select="$TracingQuotesRight"/></xsl:attribute>
             </xsl:otherwise>
             </xsl:choose>
             <xsl:call-template name="chopPunctuation">
@@ -600,7 +602,7 @@
                         <xsl:with-param name="codes">a_t</xsl:with-param>
                     </xsl:call-template>
                 </xsl:variable>
-             <a><xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=<xsl:value-of select="translate($f780, '()', '')"/></xsl:attribute>
+             <a><xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=<xsl:value-of select="str:encode-uri(translate($f780, '()', ''), true())"/></xsl:attribute>
                 <xsl:value-of select="translate($f780, '()', '')"/>
             </a>
         </span>
@@ -651,7 +653,7 @@
                     </xsl:call-template>
                 </xsl:variable>
 
-                <a><xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=<xsl:value-of select="translate($f785, '()', '')"/></xsl:attribute>
+                <a><xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=<xsl:value-of select="str:encode-uri(translate($f785, '()', ''), true())"/></xsl:attribute>
                 <xsl:value-of select="translate($f785, '()', '')"/>
             </a>
 
diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/xslt/NORMARCslim2OPACResults.xsl b/koha-tmpl/opac-tmpl/bootstrap/en/xslt/NORMARCslim2OPACResults.xsl
index 3cdcd0e4a1..b1391463d0 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/xslt/NORMARCslim2OPACResults.xsl
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/xslt/NORMARCslim2OPACResults.xsl
@@ -8,7 +8,7 @@
   xmlns:items="http://www.koha-community.org/items"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
   xmlns:str="http://exslt.org/strings"
-  exclude-result-prefixes="marc items">
+  exclude-result-prefixes="marc items str">
     <xsl:import href="NORMARCslimUtils.xsl"/>
     <xsl:output method = "html" indent="yes" omit-xml-declaration = "yes" encoding="UTF-8"/>
     <xsl:key name="item-by-status" match="items:item" use="items:status"/>
@@ -396,10 +396,10 @@
             <a>
             <xsl:choose>
             <xsl:when test="$UseControlNumber = '1' and marc:controlfield[@tag=001]">
-                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=rcn:<xsl:value-of select="marc:controlfield[@tag=001]"/>+and+(bib-level:a+or+bib-level:b)</xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=rcn:<xsl:value-of select="str:encode-uri(marc:controlfield[@tag=001], true())"/>+and+(bib-level:a+or+bib-level:b)</xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
-                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=Host-item:<xsl:value-of select="translate(marc:datafield[@tag=245]/marc:subfield[@code='a'], '/', '')"/></xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=Host-item:<xsl:value-of select="str:encode-uri(translate(marc:datafield[@tag=245]/marc:subfield[@code='a'], '/', ''), true())"/></xsl:attribute>
             </xsl:otherwise>
             </xsl:choose>
             <xsl:text>Show analytics</xsl:text>
@@ -441,7 +441,7 @@
                     </a>
                 </xsl:when>
                 <xsl:otherwise>
-                    <a><xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=ti,phr:<xsl:value-of select="translate($f773, '()', '')"/></xsl:attribute>
+                    <a><xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=ti,phr:<xsl:value-of select="str:encode-uri(translate($f773, '()', ''), true())"/></xsl:attribute>
                         <xsl:value-of select="$f773"/>
                     </a>
                     <xsl:if test="marc:subfield[@code='g']"><xsl:text> </xsl:text><xsl:value-of select="marc:subfield[@code='g']"/></xsl:if>
diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/xslt/NORMARCslimUtils.xsl b/koha-tmpl/opac-tmpl/bootstrap/en/xslt/NORMARCslimUtils.xsl
index cb7d18ff27..403087a8d8 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/xslt/NORMARCslimUtils.xsl
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/xslt/NORMARCslimUtils.xsl
@@ -1,6 +1,10 @@
 <?xml version='1.0'?>
 <!DOCTYPE stylesheet [<!ENTITY nbsp "&#160;" >]>
-<xsl:stylesheet version="1.0" xmlns:marc="http://www.loc.gov/MARC21/slim" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<xsl:stylesheet version="1.0"
+  xmlns:marc="http://www.loc.gov/MARC21/slim"
+  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+  xmlns:str="http://exslt.org/strings"
+  exclude-result-prefixes="str">
 	<xsl:template name="datafield">
 		<xsl:param name="tag"/>
 		<xsl:param name="ind1"><xsl:text> </xsl:text></xsl:param>
@@ -223,7 +227,7 @@
                             </xsl:when>
                             <xsl:when test="boolean($index)">
                                 <a>
-                                    <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=<xsl:value-of  select="$index"/>:<xsl:value-of  select="marc:subfield[@code='a']"/></xsl:attribute>
+                                    <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=<xsl:value-of  select="$index"/>:<xsl:value-of  select="str:encode-uri(marc:subfield[@code='a'], true())"/></xsl:attribute>
                                     <xsl:value-of select="$str"/>
                                 </a>
                             </xsl:when>