CVE-2024-23179

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2024-01-12 · updated 2026-06-17
Weakness: CWE-79

Description

An issue was discovered in the GlobalBlocking extension in MediaWiki before 1.40.2. For a Special:GlobalBlock?uselang=x-xss URI, i18n-based XSS can occur via the parentheses message. This affects subtitle links in buildSubtitleLinks.

Affected products

Wikimedia Foundation MediaWiki: before 1.40.2 — fixed in 1.40.2

How to fix

Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.40.2. Check the vendor advisory for mitigations.

References

https://lists.wikimedia.org/hyperkitty/list/mediawiki-announce%40lists.wikimedia.org/message/TDBUBCCOQJUT4SCHJNPHKQNPBUUETY52/
https://phabricator.wikimedia.org/T347746
https://lists.wikimedia.org/hyperkitty/list/mediawiki-announce%40lists.wikimedia.org/message/TDBUBCCOQJUT4SCHJNPHKQNPBUUETY52/
https://phabricator.wikimedia.org/T347746

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