Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-102581

CVE-2026-102581MEDIUM

Moodle: xss in forum post templates due to insufficient escaping

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   R  C  L  L  N    5.4   .0020    8.7     —

AFFECTED
  Product  Versions  Fixed
  moodle   5.2.0 –   —

TIMELINE
  Sep 29  Reserved by fedora
  Sep 30  Published (CNA: fedora)
  Oct 1   RESCORED — CVE-2026-102581 (moodle). CVSS 4.6 → 5.4 (NVD).

CWE-79 · CNA: fedora · CVSS v3.1 · 4 references · NVD status: Analyzed

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 29, 2026	Reserved	Reserved by fedora
September 30, 2026	Published	Published (CNA: fedora)
October 1, 2026	RESCORED	RESCORED — CVE-2026-102581 (moodle). CVSS 4.6 → 5.4 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
—	moodle	—	5.2.0	—

Weaknesses

CWE-79

References (4)

http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88981 [Patch]
https://access.redhat.com/security/cve/CVE-2026-102581 [Third Party Advisory]
https://bugzilla.redhat.com/show_bug.cgi?id=2543634 [Issue Tracking, Third Party Advisory]
https://moodle.org/mod/forum/discuss.php?d=482499 [Vendor Advisory]

Authoritative record: CVE-2026-102581 at cve.org

Weaknesses: CWE-79

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-102581 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.