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CVE-2017-0363

Special:UserLogin?returnto=interwiki:foo will redirect to external sites

EPSS 1.1%
Mediawiki before 1.28.1 / 1.27.2 / 1.23.16 has a flaw where Special:UserLogin?returnto=interwiki:foo will redirect to external sites.
Affected products
mediawiki · mediawiki

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References
https://lists.wikimedia.org/pipermail/mediawiki-announce/2017-April/000207.htmlhttps://phabricator.wikimedia.org/T109140https://security-tracker.debian.org/tracker/CVE-2017-0363