What’s Vulnerable › Vulnerabilities

CVE-2021-46146

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-10 · updated 2026-06-17
• Weakness: CWE-79

Description

An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. The WikibaseMediaInfo component is vulnerable to XSS via the caption fields for a given media file.

Affected products

• Wikimedia Foundation MediaWiki: before 1.35.5; from 1.36.0 before 1.36.3; from 1.37.0 before 1.37.1 — fixed in 1.35.5, 1.36.3, 1.37.1

How to fix

Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.35.5, 1.36.3, 1.37.1. Check the vendor advisory for mitigations.

References

• https://gerrit.wikimedia.org/r/q/I58d37fb59f998f5bec4a018bf9da96a777f8ff78
• https://phabricator.wikimedia.org/T293556
• https://gerrit.wikimedia.org/r/q/I58d37fb59f998f5bec4a018bf9da96a777f8ff78
• https://phabricator.wikimedia.org/T293556

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