MediaWiki Cross-site Scripting (XSS) vulnerability
Moderate severity
GitHub Reviewed
Published
to the GitHub Advisory Database
•
Updated
Package
mediawiki/core
(Composer)
Affected versions
>= 1.31.0, < 1.31.9
>= 1.32.0, < 1.34.3
>= 1.35.0-rc.0, < 1.35.0
Patched versions
1.31.9
1.34.3
1.35.0
Description
In MediaWiki before 1.31.9 and 1.32.x through 1.34.x before 1.34.3, XSS related to jQuery can occur. The attacker creates a message with [javascript:payload xss] and turns it into a jQuery object with mw.message().parse(). The expected result is that the jQuery object does not contain an tag (or it does not have a href attribute, or it's empty, etc.). The actual result is that the object contains an <a href ="javascript... that executes when clicked.
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-25814
- https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html
- https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html
- https://www.mediawiki.org/wiki/ResourceLoader/Core_modules#mediawiki.jqueryMsg
- https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2020-25814.yaml
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6
- https://phabricator.wikimedia.org/T86738
Published by the National Vulnerability Database
Published to the GitHub Advisory Database
Reviewed
Last updated
Severity
Moderate
/ 10
CVSS v3 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
EPSS score
(68th percentile)
Weaknesses
CVE ID
CVE-2020-25814
GHSA ID
GHSA-4vr7-m8p8-434h
Source code
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