The "classname" parameter on the admin ad-hoc tasks page required additional sanitizing to prevent a reflected XSS risk.
| Severity/Risk: | Serious |
| Versions affected: | 4.3 and 4.2 to 4.2.3 |
| Versions fixed: | 4.3.1 and 4.2.4 |
| Reported by: | Paul Holden |
| CVE identifier: | CVE-2023-6670 |
| Changes (master): | http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-79839 |
| Tracker issue: | MDL-79839 Reflected XSS risk on ad-hoc tasks page |