CVE-2024-47845

CSS sanitizer used incorrectly, and is easily bypassed

Published Oct 5, 2024 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-42707 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.
History
Type Values Removed Values Added
First Time appeared Wikimedia wikimedia-extensions-css
CPEs cpe:2.3:a:wikimedia:wikimedia-extensions-css:*:*:*:*:*:*:*:*
Vendors & Products Wikimedia wikimedia-extensions-css
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N'}

Type Values Removed Values Added
First Time appeared Wikimedia
Wikimedia mediawiki-extensions-css
CPEs cpe:2.3:a:wikimedia:mediawiki-extensions-css:*:*:*:*:*:*:*:*
Vendors & Products Wikimedia
Wikimedia mediawiki-extensions-css
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title CSS sanitizer used incorrectly, and is easily bypassed
Weaknesses CWE-116
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
wikimedia-foundation
Published
Updated
Oct 7, 2024, 5:39 PM
Reserved
Oct 3, 2024, 11:44 PM
Status
Analyzed
Published
Oct 5, 2024, 1:15 AM
Modified
Jun 17, 2026, 7:57 AM