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.

CVSS 3.1

5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 9% of CVEs (scores of 2026-10-25)

CWE

CWE-79

Published

2026-09-30

Modified

2026-10-01

Record from

the NVD, synced 2026-10-19

Affected

• 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

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