CVE-2020-35478

MEDIUM

MediaWiki 1.33.0-1.35.0 - Cross-Site Scripting via BlockLogFormatter.php

Title source: llm

Description

MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. MediaWiki:blanknamespace potentially can be output as raw HTML with SCRIPT tags via LogFormatter::makePageLink(). This affects MediaWiki 1.33.0 and later.

References (3)

Core 3

Core References

Exploit, Third Party Advisory x_refsource_misc

https://phabricator.wikimedia.org/T268938

Mailing List, Release Notes, Vendor Advisory x_refsource_misc

https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/

Scores

CVSS v3 6.1

EPSS 0.0045

EPSS Percentile 63.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE

CWE-79

Status published

Products (2)

fedoraproject/fedora 33

mediawiki/mediawiki 1.33.0 - 1.35.1

Published Dec 18, 2020

Tracked Since Feb 18, 2026