What’s Vulnerable › Vulnerabilities

CVE-2021-42043

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-06 · updated 2026-06-17
• Weakness: CWE-79

Description

An issue was discovered in Special:MediaSearch in the MediaSearch extension in MediaWiki through 1.36.2. The suggestion text (a parameter to mediasearch-did-you-mean) was not being properly sanitized and allowed for the injection and execution of HTML and JavaScript via the intitle: search operator within the query.

Affected products

• Wikimedia Foundation MediaWiki: through 1.36.2

References

• https://gerrit.wikimedia.org/r/q/If64eb5842237c92290d07ebc3fe14710d9de3fc2
• https://phabricator.wikimedia.org/T291600
• https://gerrit.wikimedia.org/r/q/If64eb5842237c92290d07ebc3fe14710d9de3fc2
• https://phabricator.wikimedia.org/T291600

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