What is CVE-2025-26531?

CVE-2025-26531 is a low-severity vulnerability in Moodle, classified under Incorrect Authorization. CVSS score: 3.1/10. Published 2025-02-24.

How severe is CVE-2025-26531?

Low severity. CVSS v3 base score is 3.1 out of 10.

Auth bypass in Moodle

CVE-2025-26531

Insufficient capability checks made it possible to disable badges a user does not have permission to access.

Vulnerability class: Broken Access Control

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

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.003 (20.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.2% 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-2025-26531?: CVE-2025-26531 is a low-severity vulnerability in Moodle, classified under Incorrect Authorization. CVSS score: 3.1/10. Published 2025-02-24.
How severe is CVE-2025-26531?: Low severity. CVSS v3 base score is 3.1 out of 10.