Multiple cross-site scripting (XSS) vulnerabilities in Moodle through 2.3.11, 2.4.x before 2.4.11, 2.5.x before 2.5.7, 2.6.x before 2.6.4, and 2.7.x before 2.7.1 allow remote attackers to inject arbitrary web script or HTML via vectors that trigger an AJAX exception dialog.
https://github.com/advisories/GHSA-f66h-6mj2-rwj2
https://moodle.org/mod/forum/discuss.php?d=264270
https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-3701
http://www.securityfocus.com/bid/68766
http://openwall.com/lists/oss-security/2014/07/21/1
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-45471