Medium severity · published Dec 18, 2020
CVE-2020-35480
An issue was discovered in MediaWiki before 1.35.1
5.3
CVSS
1.5%
EPSS
No
On KEV
Description
An issue was discovered in MediaWiki before 1.35.1. Missing users (accounts that don't exist) and hidden users (accounts that have been explicitly hidden due to being abusive, or similar) that the viewer cannot see are handled differently, exposing sensitive information about the hidden status to unprivileged viewers. This exists on various code paths.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 74% 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-2020-35480
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-35480
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
Permissions Required
https://phabricator.wikimedia.org/T120883
Mailing List
https://www.debian.org/security/2020/dsa-4816
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