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.

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

Published 2025-02-24 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.003 (23.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Moodle
Moodle Project — versions 4.5.0, 4.4.0, 4.3.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

moodle.org/mod/forum/discuss.php (vendor-advisory, Vendor Advisory)
git.moodle.org/gw (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.