CVE-2020-27621

The FileImporter extension in MediaWiki through 1.35.0 was not properly attributing various user actions to a specific user's IP address. Instead, for various actions, it would report the IP address of an internal Wikimedia Foundation server by omitting X-Forwarded-For data. This resulted in an inability to properly audit and attribute various user actions performed via the FileImporter extension.

• https://gerrit.wikimedia.org/r/q/I24a240253c7a5c66dd493a68e8c23d95a17e1b21Exploit, Patch, Vendor Advisory
• https://phabricator.wikimedia.org/T265810Exploit, Patch, Vendor Advisory
• https://gerrit.wikimedia.org/r/q/I24a240253c7a5c66dd493a68e8c23d95a17e1b21Exploit, Patch, Vendor Advisory
• https://phabricator.wikimedia.org/T265810Exploit, Patch, Vendor Advisory

Published

Oct 22, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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