Bug 19079 - XSS Flaws in Membership page

Bug 19079 - XSS Flaws in Membership page

1. Hit /cgi-bin/koha/members/moremember.pl?borrowernumber=xx<script>alert('amit')</script>.
   xx - is a borrowernumber
2. Notice the java script is executed.
4. Apply patch.
5. Reload page, and hit the page again /cgi-bin/koha/members/moremember.pl?borrowernumber=xx<script>alert('amit')</script>.
   xx - is a borrowernumber.
6. Notice it is no longer executed.

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 4f48532c4f3bede64533af6415e507640e2ed6e0)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>