Auth bypass in Moodle

CVE-2025-26526

Separate Groups mode restrictions were not factored into permission checks before allowing viewing or deletion of responses in Feedback activities.

Vulnerability class: Broken Access Control

EPSS: 0.003 (23.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Moodle
Moodle Project — versions 4.5.0, 4.4.0, 4.3.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

patrick@puiterwijk.org (vendor-advisory, Vendor Advisory)
patrick@puiterwijk.org (Patch, patch)

Frequently asked questions

What is CVE-2025-26526?: CVE-2025-26526 is a medium-severity vulnerability in Moodle, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2025-02-24.
How severe is CVE-2025-26526?: Medium severity. CVSS v3 base score is 6.5 out of 10.