What is CVE-2026-100237?

CVE-2026-100237 is a medium-severity vulnerability in The Wikimedia Foundation MediaWiki - Thanks Extension, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-25.

How severe is CVE-2026-100237?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in The Wikimedia Foundation MediaWiki - Thanks Extension

CVE-2026-100237

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - Thanks Extension allows Stored XSS. This issue affects Mediawiki - Thanks Extension: from * before 1.43.10/1.45.5/1.46.1.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-09-25 · last modified 2026-09-25.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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.

Affected products

The Wikimedia Foundation MediaWiki - Thanks Extension

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-100237?: CVE-2026-100237 is a medium-severity vulnerability in The Wikimedia Foundation MediaWiki - Thanks Extension, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-25.
How severe is CVE-2026-100237?: Medium severity. CVSS v3 base score is 6.1 out of 10.