CVE-2026-102581
Insufficient output escaping in templates used to display forum posts enables a stored cross-site scripting (XSS) vulnerability.
Does this matter?
Lower severity and a low EPSS score (0.20%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.20% probability · 9th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- moodle/moodle
- Source
- patrick@puiterwijk.org
EPSS moved from 0.2% on 30 September 2026 to 0.2% on 26 October 2026.
References
- http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88981Patch
- https://access.redhat.com/security/cve/CVE-2026-102581Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2543634Issue Tracking, Third Party Advisory
- https://moodle.org/mod/forum/discuss.php?d=482499Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.