Description
MediaWiki before 1.35.1 blocks legitimate attempts to hide log entries in some situations. If one sets MediaWiki:Mainpage to Special:MyLanguage/Main Page, visits a log entry on Special:Log, and toggles the "Change visibility of selected log entries" checkbox (or a tags checkbox) next to it, there is a redirection to the main page's action=historysubmit (instead of the desired behavior in which a revision-deletion form appears).
References (5)
Core 5
Core References
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://phabricator.wikimedia.org/T205908
Mailing List, Release Notes, Vendor Advisory x_refsource_misc
https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2020/dsa-4816
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/
Scores
CVSS v3
5.3
EPSS
0.0151
EPSS Percentile
71.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Details
CWE
CWE-670
Status
published
Products (4)
debian/debian_linux
9.0
debian/debian_linux
10.0
fedoraproject/fedora
33
mediawiki/mediawiki
< 1.35.1
Published
Dec 18, 2020
Tracked Since
Feb 18, 2026