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MediaWiki Cross-site Scripting (XSS) vulnerability

Moderate severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated May 17, 2024

Package

composer mediawiki/core (Composer)

Affected versions

>= 1.34.0, < 1.34.3
>= 1.35.0-rc.0, < 1.35.0

Patched versions

1.34.3
1.35.0

Description

An issue was discovered in MediaWiki 1.34.x before 1.34.3. 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.

References

Published by the National Vulnerability Database Sep 27, 2020
Published to the GitHub Advisory Database May 24, 2022
Reviewed May 17, 2024
Last updated May 17, 2024

Severity

Moderate
6.1
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses

CVE ID

CVE-2020-25812

GHSA ID

GHSA-rj9p-8jxj-2ch4

Source code

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