PT-2021-3353 · Mediawiki+1 · Mediawiki+1

Grunny · Published 2021-04-06 · Updated 2024-03-06 · CVE-2021-30157

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions MediaWiki versions 1.31.12 and earlier MediaWiki versions 1.32.x through 1.35.x before 1.35.2

Description The issue exists due to the lack of protection for the web page structure, allowing a remote attacker to conduct cross-site scripting (XSS) attacks. On ChangesList special pages, such as Special:RecentChanges and Special:Watchlist, some label messages are output in HTML unescaped, leading to XSS.

Recommendations For MediaWiki versions 1.31.12 and earlier, update to version 1.31.12 or later. For MediaWiki versions 1.32.x through 1.35.x before 1.35.2, update to version 1.35.2 or later. As a temporary workaround, consider restricting access to the ChangesList special pages, such as Special:RecentChanges and Special:Watchlist, until a patch is available.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

ALT-PU-2021-1712

ALT-PU-2021-2091

BDU:2021-03171

BIT-MEDIAWIKI-2021-30157

CVE-2021-30157

DSA-4889-1

Affected Products

Alt Linux

Mediawiki

References · 22

• 🔥 https://phabricator.wikimedia.org/T278058 · Exploit
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/26UJGHF7LJDOCQN6A3Z4PM7PYRKENJHE · Vendor Advisory
• https://debian.org/security/2021/dsa-4889 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-03171 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2OMSV7B2TCFBOCICN3B4SMQP5HVRJQIT · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/26UJGHF7LJDOCQN6A3Z4PM7PYRKENJHE · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-30157 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-30157 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-30157 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-30157 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4889-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-30157 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/2OMSV7B2TCFBOCICN3B4SMQP5HVRJQIT · Vendor Advisory
• https://security.gentoo.org/glsa/202107-40 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-mediawiki-2021-30157 · Vendor Advisory