Cross Site Scripting vulnerability in Koha ILS 23.05 and before allows a remote attacker to execute arbitrary code via the additonal-contents.pl component.
https://febin0x4e4a.wordpress.com/2024/03/07/xss-to-one-click-rce-in-koha-ils/
https://febin0x4e4a.wordpress.com/2023/01/11/xss-vulnerability-in-koha-integrated-library-system/