If the algebra filter was enabled but not functional (eg the necessary binaries were missing from the server), it presented an XSS risk.
| Severity/Risk: | Minor |
| Versions affected: | 4.1 to 4.1.1, 4.0 to 4.0.6, 3.11 to 3.11.12, 3.9 to 3.9.19 and earlier unsupported versions |
| Versions fixed: | 4.1.2, 4.0.7, 3.11.13 and 3.9.20 |
| Reported by: | Petr Skoda |
| Workaround: | Ensure that if the algebra filter is enabled, it is correctly configured and functional (otherwise, ensure it is disabled). |
| CVE identifier: | CVE-2023-28332 |
| Changes (master): | http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-77524 |
| Tracker issue: | MDL-77524 Algebra filter XSS when filter is misconfigured |