CVE-2020-35479
Fixed in a distro release EPSS 1%
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.
Products: mediawiki, debian_linux, fedoraproject fedora
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Arch Linux | mediawiki | 1.35.1-1 |
| Debian 10 | mediawiki | 1:1.31.12-1~deb10u1 |
| Debian 12 | mediawiki | 1:1.35.1-1 |
| Debian 13 | mediawiki | 1:1.35.1-1 |
| Debian 14 | mediawiki | 1:1.35.1-1 |
| Debian 9 | mediawiki | 1:1.27.7-1~deb9u7 |
| Ubuntu 18.04 LTS | mediawiki | no fix |
| Ubuntu 25.10 | mediawiki | no fix |
| Ubuntu 26.04 LTS | mediawiki | no fix |
| Ubuntu 26.10 | mediawiki | no fix |
| Ubuntu Pro 20.04 LTS | mediawiki | no fix |
| Ubuntu Pro 22.04 LTS | mediawiki | no fix |
| Ubuntu Pro 24.04 LTS | mediawiki | no fix |