Description
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.
References (8)
Core 8
Core References
Patch, Vendor Advisory x_refsource_misc
https://phabricator.wikimedia.org/T248947
Release Notes, Vendor Advisory x_refsource_confirm
https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_34/RELEASE-NOTES-1.34
Release Notes, Vendor Advisory x_refsource_confirm
https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_33/RELEASE-NOTES-1.33
Release Notes, Vendor Advisory x_refsource_confirm
https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_31/RELEASE-NOTES-1.31
Mailing List, Release Notes, Vendor Advisory x_refsource_confirm
https://lists.wikimedia.org/pipermail/wikitech-l/2020-June/093535.html
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EEZIMLJMJS72SJXPYL736XMUAVCRQD2H/
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2020/dsa-4767
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html
Scores
CVSS v3
3.1
EPSS
0.0074
EPSS Percentile
73.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Details
Status
published
Products (5)
debian/debian_linux
9.0
debian/debian_linux
10.0
fedoraproject/fedora
32
mediawiki/core
0 - 1.31.8Packagist
mediawiki/mediawiki
< 1.31.8
Published
Jun 24, 2020
Tracked Since
Feb 18, 2026