PT-2021-23480 · Mediawiki+1 · Mediawiki+1

Zabe · Published 2021-10-06 · Updated 2024-03-06 · CVE-2021-42041

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 prior to 1.36.3

Description An issue was discovered in CentralAuth in MediaWiki where the rightsnone MediaWiki message was not being properly sanitized. This allowed for the injection and execution of HTML and JavaScript via the setchange log.

Recommendations For versions prior to 1.36.3, update to version 1.36.3 or later to resolve the issue. As a temporary workaround, consider restricting access to the setchange log to minimize the risk of exploitation.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

ALT-PU-2021-3561

ALT-PU-2022-1199

BIT-MEDIAWIKI-2021-42041

CVE-2021-42041

Affected Products

Alt Linux

Mediawiki

References · 5

• 🔥 https://phabricator.wikimedia.org/T291696 · Exploit
• https://gerrit.wikimedia.org/r/q/I7aeaa6e4de5ccaa5eeb6bf4fb00c96b01d5fea35 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-42041 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42041 · Security Note
• https://osv.dev/vulnerability/BIT-mediawiki-2021-42041 · Vendor Advisory