What’s Vulnerable › Vulnerabilities
CVE-2021-20279
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-03-15 · updated 2026-06-17
- Weakness: CWE-79
Description
The ID number user profile field required additional sanitizing to prevent a stored XSS risk in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.
Affected products
- Fedoraproject Fedora: 32, 34
- Moodle: from 3.5.0 before 3.5.17; from 3.8.0 before 3.8.8; from 3.9.0 before 3.9.5; from 3.10.0 before 3.10.2 — fixed in 3.10.2, 3.5.17, 3.8.8, 3.9.5
How to fix
Upgrade to a fixed version: Moodle 3.10.2, 3.5.17, 3.8.8, 3.9.5. Check the vendor advisory for mitigations.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1939033
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AFSNJ7XHVTC52RSRX2GBQFF3VEEAY2MS/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFH5DDMU5TZ3JT4Q52WMRAHACA5MHIMT/
- https://moodle.org/mod/forum/discuss.php?d=419650
- https://bugzilla.redhat.com/show_bug.cgi?id=1939033
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AFSNJ7XHVTC52RSRX2GBQFF3VEEAY2MS/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFH5DDMU5TZ3JT4Q52WMRAHACA5MHIMT/
- https://moodle.org/mod/forum/discuss.php?d=419650
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