Bug 19051 - XSS Flaws in - Batch record deletion page

Bug 19051 - XSS Flaws in - Batch record deletion page

1. Hit /cgi-bin/koha/tools/batch_delete_records.pl
2. Enter <IFRAME SRC="javascript:alert('XSS');"></IFRAME> in the Record number list (one per line) text area.
3. Notice the iframe is executed.
4. Apply patch.
5. Reload page, and enter iframe again on Record number list (one per line) text area.
6. Notice it is no longer executed.
7. Fixes for both biblio and authority records.

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 63fce3cdb10637a14efa5ac61e9fb21e4b04e364)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>