PT-2021-21123 · Mediawiki+1 · Mediawiki+1

Dannys712 · CVE-2021-36126 · Published 2021-06-12 · Updated 2024-03-06

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: MediaWiki versions prior to 1.37

Description: An issue was discovered in the AbuseFilter extension. If the MediaWiki:Abusefilter-blocker message is invalid within the content language, the filter user falls back to the English version, but that English version could also be invalid on a wiki. This would result in a fatal error, and potentially fail to block or restrict a potentially nefarious user.

Recommendations: For MediaWiki versions prior to 1.37, update to a version that includes the fix for this issue to prevent potential fatal errors and ensure proper blocking or restriction of potentially nefarious users.

Exploit

Fix

Related Identifiers

ALT-PU-2021-1991

ALT-PU-2021-2091

BIT-MEDIAWIKI-2021-36126

CVE-2021-36126

Affected Products

Alt Linux

Mediawiki

References · 7

• 🔥 https://phabricator.wikimedia.org/T284364 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-36126 · Security Note
• https://osv.dev/vulnerability/BIT-mediawiki-2021-36126 · Vendor Advisory
• https://gerrit.wikimedia.org/r/q/I9e9f44b7663e810de70fb9ac7f6760f83dd4895b · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-36126 · Vendor Advisory
• https://t.me/cvenotify/16993 · Telegram Post
• https://t.me/cvenotify/16984 · Telegram Post