What’s Vulnerable › Vulnerabilities

CVE-2021-45474

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-24 · updated 2026-06-17
• Weakness: CWE-79

Description

In MediaWiki through 1.37, the Special:ImportFile URI (aka FileImporter) allows XSS, as demonstrated by the clientUrl parameter.

Affected products

• Fedoraproject Fedora: 35
• Wikimedia Foundation MediaWiki: through 1.37

References

• https://gerrit.wikimedia.org/r/q/Id1c8910aeac5b452fbabeddab70360765518223e
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7JNQA53K675TQBBJPZRAG5ZT6XES3IS/
• https://phabricator.wikimedia.org/T296605
• https://gerrit.wikimedia.org/r/q/Id1c8910aeac5b452fbabeddab70360765518223e
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7JNQA53K675TQBBJPZRAG5ZT6XES3IS/
• https://phabricator.wikimedia.org/T296605

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