Medium severity · published Dec 18, 2020
CVE-2020-35477
MediaWiki before 1.35.1 blocks legitimate attempts to hide log entries in some situations
5.3
CVSS
1.7%
EPSS
No
On KEV
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).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 77% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
FE
Fedora · Fedoraproject
33 · source: NVD
ME
Mediawiki · Mediawiki
before 1.35.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35477
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-35477
Mailing List
https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/
Mailing List
https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html
Exploit
https://phabricator.wikimedia.org/T205908
Third Party Advisory
https://www.debian.org/security/2020/dsa-4816
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