Attacker is able craft an article with a link to the customer address book with malicious content (JavaScript). When agent opens the link, JavaScript code is executed due to the missing parameter encoding. This issue affects: ((OTRS)) Community Edition: 6.0.26 and prior versions. OTRS: 7.0.15 and prior versions.
https://otrs.com/release-notes/otrs-security-advisory-2020-08/
https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00077.html
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00066.html
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00038.html