CVE-2020-15005

In MediaWiki before 1.31.8, 1.32.x and 1.33.x before 1.33.4, and 1.34.x before 1.34.2, private wikis behind a caching server using the img_auth.php image authorization security feature may have had their files cached publicly, so any unauthorized user could view them. This occurs because Cache-Control and Vary headers were mishandled.

• https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_31/RELEASE-NOTES-1.31Release Notes, Vendor Advisory
• https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_33/RELEASE-NOTES-1.33Release Notes, Vendor Advisory
• https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_34/RELEASE-NOTES-1.34Release Notes, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2020/12/msg00034.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EEZIMLJMJS72SJXPYL736XMUAVCRQD2H/
• https://lists.wikimedia.org/pipermail/wikitech-l/2020-June/093535.htmlMailing List, Release Notes, Vendor Advisory
• https://phabricator.wikimedia.org/T248947Patch, Vendor Advisory
• https://www.debian.org/security/2020/dsa-4767Third Party Advisory
• https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_31/RELEASE-NOTES-1.31Release Notes, Vendor Advisory
• https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_33/RELEASE-NOTES-1.33Release Notes, Vendor Advisory
• https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_34/RELEASE-NOTES-1.34Release Notes, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2020/12/msg00034.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EEZIMLJMJS72SJXPYL736XMUAVCRQD2H/
• https://lists.wikimedia.org/pipermail/wikitech-l/2020-June/093535.htmlMailing List, Release Notes, Vendor Advisory
• https://phabricator.wikimedia.org/T248947Patch, Vendor Advisory
• https://www.debian.org/security/2020/dsa-4767Third Party Advisory

Published

Jun 24, 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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