Auth bypass in Moodle

CVE-2020-25629

A vulnerability was found in Moodle where users with "Log in as" capability in a course context (typically, course managers) may gain access to some site administration capabilities by "logging in as" a System manager. This affects 3.9 to 3.9.1, 3.8 to 3.8.4, 3.7 to 3.7.7, 3.5 to 3.5.13 and earlier unsupported versions. This is fixed in 3.9.2, 3.8.5, 3.7.8 and 3.5.14.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.8th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2020-25629: held from 0.013 to 0.013.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: +0.000

Affected products

  • Moodle
  • Moodle — versions 3.9 to 3.9.1, 3.8 to 3.8.4, 3.7 to 3.7.7

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-25629?
CVE-2020-25629 is a high-severity vulnerability in Moodle, classified under Improper Access Control. CVSS score: 8.8/10. Published 2020-12-08.
How severe is CVE-2020-25629?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2020-25629 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.