CVE-2020-35474 — Cross-site Scripting in Mediawiki

CWE-79 — Cross-site Scripting5 documents5 sources
Severity
6.1MEDIUMNVD
EPSS
0.5%
top 35.50%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
MediawikiDebian MediawikiFedoraproject Fedora
Timeline
PublishedDec 18
Latest updateMay 24

Description

In MediaWiki before 1.35.1, the combination of Html::rawElement and Message::text leads to XSS because the definition of MediaWiki:recentchanges-legend-watchlistexpiry can be changed onwiki so that the output is raw HTML.

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/mediawiki< 1.35.1
▶Debianmediawiki/mediawiki< 1:1.35.1-1+3

Also affects: Fedora 33

🔴Vulnerability Details

2
GHSA
GHSA-xprx-5rcx-fjcv: In MediaWiki before 1↗2022-05-24
▶
OSV
CVE-2020-35474: In MediaWiki before 1↗2020-12-18
▶

📋Vendor Advisories

2
Red Hat
mediawiki: message recentchanges-legend-watchlistexpiry can contain raw html↗2020-12-18
▶
Debian
CVE-2020-35474: mediawiki - In MediaWiki before 1.35.1, the combination of Html::rawElement and Message::tex...↗2020
▶
CVE-2020-35474 — Cross-site Scripting in Mediawiki | cvebase