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CVE-2026-58520

UrlShortener defaults to ineffective validation open to third-party redirects

URL redirection to untrusted site ('open redirect') vulnerability in The Wikimedia Foundation Mediawiki - UrlShortener Extension allows Cross-Site Flashing. This issue affects Mediawiki - UrlShortener Extension: from * before 1.43.9, 1.44.6, 1.45.4.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Mediawiki Wikimedia
Products
Mediawiki Mediawiki-urlshortener Extension