CVE-2020-35479
MEDIUM6.1EPSS 0.86%Published: 12/18/2020Modified: 4/28/2026
Description
MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. Language::translateBlockExpiry itself does not escape in all code paths. For example, the return of Language::userTimeAndDate is is always unsafe for HTML in a month value. This affects MediaWiki 1.12.0 and later.
Affected packages (2)
- Bitnami/mediawiki>= 1.12.0, < 1.35.1
- Debian/mediawikifrom 0, < 1:1.35.1-1
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 (7)
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-35479
- WEBhttps://lists.debian.org/debian-lts-announce/2020/12/msg00034.html
- WEBhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/
- WEBhttps://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html
- WEBhttps://nvd.nist.gov/vuln/detail/CVE-2020-35479
- WEBhttps://phabricator.wikimedia.org/T268938
- WEBhttps://www.debian.org/security/2020/dsa-4816