High severity · published Dec 18, 2020
CVE-2020-35475
In MediaWiki before 1.35.1, the messages userrights-expiry-current and userrights-expiry-none can contain raw HTML
7.5
CVSS
1.6%
EPSS
No
On KEV
Description
In MediaWiki before 1.35.1, the messages userrights-expiry-current and userrights-expiry-none can contain raw HTML. XSS can happen when a user visits Special:UserRights but does not have rights to change all userrights, and the table on the left side has unchangeable groups in it. (The right column with the changeable groups is not affected and is escaped correctly.)
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 76% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
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-2020-35475
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-35475
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
Issue Tracking
https://phabricator.wikimedia.org/T268917
Third Party Advisory
https://www.debian.org/security/2020/dsa-4816
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