CVE-2023-45359

Severity: medium (CVSS 6.5 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: none known
Published: 2024-10-09 · updated 2026-06-17
Weakness: CWE-116

Description

An issue was discovered in the Vector Skin component for MediaWiki before 1.39.5 and 1.40.x before 1.40.1. vector-toc-toggle-button-label is not escaped, but should be, because the line param can have markup.

Affected products

mediawiki Vector Skin: before 1.39.5; from 1.40.0 before 1.40.1 — fixed in 1.39.5, 1.40.1

How to fix

Upgrade to a fixed version: mediawiki Vector Skin 1.39.5, 1.40.1. Check the vendor advisory for mitigations.

References

https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/skins/Vector/+/c17b956e0750e051ac7c1098e3ff625f0db82b2c
https://phabricator.wikimedia.org/T340217

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