Unrated severityNVD Advisory· Published Jul 1, 2026· Updated Jul 1, 2026

UrlShortener defaults to ineffective validation open to third-party redirects

CVE-2026-58520

Description

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.

Patches

Vulnerability mechanics

References

gerrit.wikimedia.org/r/q/I7a59cc4c351b5aa47ed46f7a14a1105fd1ecc5b5mitre
phabricator.wikimedia.org/T418431mitre

News mentions

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