Auth bypass in Moodle

CVE-2022-40208

In Moodle, insufficient limitations in some quiz web services made it possible for students to bypass sequential navigation during a quiz attempt.

EPSS: 0.006 (43.5th percentile) — read the EPSS interpretation.

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:N/I:L/A:N.

Affected products

Moodle — versions 3.9.0, 3.11.0, 4.0.0
N/a Moodle — versions affected 4.0 to 4.0.2, 3.11 to 3.11.8, 3.9 to 3.9.15 and earlier unsupported versions

Weakness classification (CWE)

CWE-285 — Improper Authorization

Public proof-of-concept exploits

jev770/badmoodle-scan

References

secalert@redhat.com (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2022-40208?: CVE-2022-40208 is a medium-severity vulnerability in Moodle, classified under Improper Authorization. CVSS score: 4.3/10. Published 2023-03-24.
How severe is CVE-2022-40208?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2022-40208 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.