CVE-2020-25812
MEDIUM6.1EPSS 0.37%MediaWiki Cross-site Scripting (XSS) vulnerability
Published: 5/24/2022Modified: 4/28/2026
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.
Affected packages (3)
- Bitnami/mediawiki>= 1.34.0, < 1.34.4
- Debian/mediawikifrom 0, < 1:1.35.0-1
- Packagist/mediawiki/core>= 1.34.0, < 1.34.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
References (10)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-25812
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-25812
- PATCHhttps://github.com/wikimedia/mediawiki
- WEBhttps://gerrit.wikimedia.org/g/mediawiki/core/+/ad4a3ba45fb955aa8c0eb3c83809b16b40a498b9/includes/specials/SpecialContributions.php#592
- WEBhttps://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2020-25812.yaml
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6
- WEBhttps://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html
- WEBhttps://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html
- WEBhttps://phabricator.wikimedia.org/T255918