Medium severity · published Sep 27, 2020
CVE-2020-25812
An issue was discovered in MediaWiki 1.34.x before 1.34.4
6.1
CVSS
1.1%
EPSS
No
On KEV
Description
An issue was discovered in MediaWiki 1.34.x before 1.34.4. On Special:Contributions, the NS filter uses unescaped messages as keys in the option key for an HTMLForm specifier. This is vulnerable to a mild XSS if one of those messages is changed to include raw HTML.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
33 · source: NVD
ME
Mediawiki · Mediawiki
1.34.0 before 1.34.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-25812
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-25812
Vendor Advisory
https://gerrit.wikimedia.org/g/mediawiki/core/+/ad4a3ba45fb955aa8c0eb3c83809b16b40a498b9/includes/specials/SpecialContributions.php#592
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/
Mailing List
https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html
Mailing List
https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html
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