XSS in Moodle
CVE-2025-67850
A flaw was found in moodle. This vulnerability, known as Cross-Site Scripting (XSS), occurs due to insufficient checks on user-provided data in the formula editor's arithmetic expression fields. A remote attacker could inject malicious code into these fields. When other users view these expressions, the malicious code would execute in their web browsers, potentially compromising their data or leading to unauthorized actions.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.003 (18.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.
Affected products
- Moodle — versions 5.1.0
Weakness classification (CWE)
References
- patrick@puiterwijk.org (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
- patrick@puiterwijk.org (x_refsource_REDHAT, issue-tracking, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2025-67850?
- CVE-2025-67850 is a high-severity vulnerability in Moodle, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2026-02-03.
- How severe is CVE-2025-67850?
- High severity. CVSS v3 base score is 7.3 out of 10.