What’s Vulnerable › Vulnerabilities
CVE-2021-41798
- Severity: medium (CVSS 6.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.4% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2021-10-11 · updated 2026-06-17
- Weakness: CWE-79
Description
MediaWiki before 1.36.2 allows XSS. Month related MediaWiki messages are not escaped before being used on the Special:Search results page.
Affected products
- Fedoraproject Fedora: 33, 34, 35
- Wikimedia Foundation MediaWiki: before 1.36.2 — fixed in 1.36.2
How to fix
Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.36.2. Check the vendor advisory for mitigations.
References
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CJDYJQWT43GBD6GNQ4OW7JOZ6WQ6DZTN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX/
- https://phabricator.wikimedia.org/T285515
- https://security.gentoo.org/glsa/202305-24
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CJDYJQWT43GBD6GNQ4OW7JOZ6WQ6DZTN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX/
- https://phabricator.wikimedia.org/T285515
- https://security.gentoo.org/glsa/202305-24
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