XSS in Moodle
CVE-2025-26529
Description information displayed in the site administration live log required additional sanitizing to prevent a stored XSS risk.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.005 (39.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.
Affected products
- Moodle
- Moodle Project — versions 4.5.0, 4.4.0, 4.3.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- patrick@puiterwijk.org (vendor-advisory, Vendor Advisory)
- patrick@puiterwijk.org (Patch, patch)
Frequently asked questions
- What is CVE-2025-26529?
- CVE-2025-26529 is a high-severity vulnerability in Moodle, classified under Cross-site Scripting. CVSS score: 8.3/10. Published 2025-02-24.
- How severe is CVE-2025-26529?
- High severity. CVSS v3 base score is 8.3 out of 10.
- Is CVE-2025-26529 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.