Auth bypass in Moodle
CVE-2021-20283
The web service responsible for fetching other users' enrolled courses did not validate that the requesting user had permission to view that information in each course in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.011 (63.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Moodle
- Fedoraproject Fedora — versions 32, 34
- Moodle — versions Fixed in 3.10.2, 3.9.5, 3.8.8, 3.5.17
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- moodle.org/mod/forum/discuss.php (Patch, Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2021-20283?
- CVE-2021-20283 is a medium-severity vulnerability in Moodle, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2021-03-15.
- How severe is CVE-2021-20283?
- Medium severity. CVSS v3 base score is 4.3 out of 10.
- Is CVE-2021-20283 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.