What is CVE-2026-102581?

CVE-2026-102581 is a medium-severity vulnerability, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2026-09-30.

How severe is CVE-2026-102581?

Medium severity. CVSS v3 base score is 4.6 out of 10.

CVE-2026-102581

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-09-30.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

git.moodle.org/gw
access.redhat.com/security/cve/CVE-2026-102581 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)
moodle.org/mod/forum/discuss.php

Frequently asked questions

What is CVE-2026-102581?: CVE-2026-102581 is a medium-severity vulnerability, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2026-09-30.
How severe is CVE-2026-102581?: Medium severity. CVSS v3 base score is 4.6 out of 10.