CVE-2020-35479 — Cross-site Scripting in Mediawiki

CWE-79 — Cross-site Scripting5 documents5 sources
Severity
6.1MEDIUMNVD
EPSS
0.9%
top 24.95%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
MediawikiDebian MediawikiDebian Linux+1 more
Timeline
PublishedDec 18
Latest updateMay 24

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitability: 2.8 | Impact: 2.7

Affected Packages3 packages

▶debiandebian/mediawiki< mediawiki 1:1.35.1-1 (bookworm)
▶NVDmediawiki/mediawiki1.12.0 — 1.35.1
▶Debianmediawiki/mediawiki< 1:1.35.1-1+3

Also affects: Debian Linux 10.0, 9.0, Fedora 33

🔴Vulnerability Details

2
GHSA
GHSA-2m4p-pvg2-r5cw: MediaWiki before 1↗2022-05-24
▶
OSV
CVE-2020-35479: MediaWiki before 1↗2020-12-18
▶

📋Vendor Advisories

2
Red Hat
mediawiki: potential XSS via the month messages such as MediaWiki:january through MediaWiki:december outputting Block Logs↗2020-12-18
▶
Debian
CVE-2020-35479: mediawiki - MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. Language::translat...↗2020
▶
CVE-2020-35479 — Cross-site Scripting in Mediawiki | cvebase