CVE-2026-100237: Stored i18n XSS in the Flow integration of Thanks

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-25 · updated 2026-09-28
Weakness: CWE-79

Description

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.

Affected products

The Wikimedia Foundation Mediawiki - Thanks Extension: before 1.43.10/1.45.5/1.46.1 — fixed in 1.43.10/1.45.5/1.46.1

How to fix

Upgrade to a fixed version: The Wikimedia Foundation Mediawiki - Thanks Extension 1.43.10/1.45.5/1.46.1. Check the vendor advisory for mitigations.

References

https://gerrit.wikimedia.org/r/q/I6d563f9cdab25c07dcd0083f3af2126e0859d098
https://phabricator.wikimedia.org/T432424

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