What’s Vulnerable › Vulnerabilities

CVE-2024-23171

• Severity: medium (CVSS 5.4 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 CampaignEvents extension in MediaWiki before 1.35.14, 1.36.x through 1.39.x before 1.39.6, and 1.40.x before 1.40.2. The Special:EventDetails page allows XSS via the x-xss language setting for internationalization (i18n).

Affected products

• Wikimedia Foundation MediaWiki: before 1.35.14; from 1.36.0 before 1.39.6; from 1.40.0 before 1.40.2 — fixed in 1.35.14, 1.39.6, 1.40.2

How to fix

Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.35.14, 1.39.6, 1.40.2. Check the vendor advisory for mitigations.

References

• https://gerrit.wikimedia.org/r/q/I70d71c409193e904684dfb706d424b0a815fa6f6
• https://phabricator.wikimedia.org/T348343
• https://gerrit.wikimedia.org/r/q/I70d71c409193e904684dfb706d424b0a815fa6f6
• https://phabricator.wikimedia.org/T348343

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