What’s Vulnerable › Vulnerabilities

CVE-2020-35622

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-12-21 · updated 2026-06-17
• Weakness: CWE-79

Description

An issue was discovered in the GlobalUsage extension for MediaWiki through 1.35.1. SpecialGlobalUsage.php calls WikiMap::makeForeignLink unsafely. The $page variable within the formatItem function was not being properly escaped, allowing for XSS under certain conditions.

Affected products

• Wikimedia Foundation MediaWiki: through 1.35.1

References

• https://gerrit.wikimedia.org/r/c/mediawiki/extensions/GlobalUsage/+/646744
• https://phabricator.wikimedia.org/T268341
• https://gerrit.wikimedia.org/r/c/mediawiki/extensions/GlobalUsage/+/646744
• https://phabricator.wikimedia.org/T268341

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