Bug 15111 - Koha is vulnerable to Cross-Frame Scripting (XFS) attacks

Bug 15111 - Koha is vulnerable to Cross-Frame Scripting (XFS) attacks

Web pages that can be embedded in frames are vulnerable to cross-frame
scripting attacks. Cross-frame scripting is a type of phishing attack
that involves instructions to an unsuspecting user to follow a specific
link to update confidential information in an online application.
Because the link leads to a legitimate page from the online application
that is embedded in a frame hosted by the attackers' server, the
attackers can capture all the information that the user enters.

https://www.owasp.org/index.php/Clickjacking_Defense_Cheat_Sheet
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit dc03bca76cf5b7cb48d98d1ce245fc65b98be929)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>