CVE-2023-45361

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-09 · updated 2026-06-17

Description

An issue was discovered in VectorComponentUserLinks.php in the Vector Skin component in MediaWiki before 1.39.5 and 1.40.x before 1.40.1. vector-intro-page MalformedTitleException is uncaught if it is not a valid title, leading to incorrect web pages.

Affected products

Wikimedia Foundation MediaWiki: before 1.40.1 — fixed in 1.40.1

How to fix

Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.40.1. Check the vendor advisory for mitigations.

References

https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/skins/Vector/+/2a452b7e2562cba32b8a17bc91dc5abb531f0a1c
https://phabricator.wikimedia.org/T340220

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