CVE-2026-102581

A flaw was found in Moodle. Insufficient output escaping in templates used to display forum posts enables a stored cross-site scripting (XSS) vulnerability. An attacker can inject malicious content into a forum post, which then executes arbitrary script code in the browser of another user viewing the affected post.

Score

CVSS 3.1 5.4 Medium

Status

Analyzed - patrick@puiterwijk.org

Published

2026-09-30

Last modified

2026-10-01

Weaknesses

CWE-79

Affected products

• Moodle (Moodle)

References

• http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88981
• https://access.redhat.com/security/cve/CVE-2026-102581
• https://bugzilla.redhat.com/show_bug.cgi?id=2543634
• https://moodle.org/mod/forum/discuss.php?d=482499