What’s Vulnerable › Vulnerabilities

CVE-2024-47845: CSS sanitizer used incorrectly, and is easily bypassed

• Severity: high (CVSS 8.2 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: 2024-10-05 · updated 2026-06-17
• Weakness: CWE-116

Description

Improper Encoding or Escaping of Output vulnerability in The Wikimedia Foundation Mediawiki - CSS Extension allows Code Injection.This issue affects Mediawiki - CSS Extension: from 1.39.X before 1.39.9, from 1.41.X before 1.41.3, from 1.42.X before 1.42.2.

Affected products

• The Wikimedia Foundation Mediawiki - CSS Extension: from 1.39.0 before 1.39.9; from 1.41.0 before 1.41.3; from 1.42.0 before 1.42.2 — fixed in 1.39.9, 1.41.3, 1.42.2

How to fix

Upgrade to a fixed version: The Wikimedia Foundation Mediawiki - CSS Extension 1.39.9, 1.41.3, 1.42.2. Check the vendor advisory for mitigations.

References

• https://gerrit.wikimedia.org/r/q/I6f38f4a8fc1dcd690ab27b8f18ce6ca903bacc53
• https://phabricator.wikimedia.org/T368594
• https://phabricator.wikimedia.org/T368628

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