PT-2021-23485 · Mediawiki+1 · Mediawiki+1

Dannys712 · Published 2021-10-06 · Updated 2024-03-06 · CVE-2021-42046

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 the GlobalWatchlist extension where the rev-deleted-user and ntimes messages were not properly escaped, allowing users to inject HTML and JavaScript.

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 disabling the GlobalWatchlist extension until a patch is available. Restrict access to the rev-deleted-user and ntimes messages to minimize the risk of exploitation.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

ALT-PU-2021-3561

ALT-PU-2022-1199

BIT-MEDIAWIKI-2021-42046

CVE-2021-42046

Affected Products

Alt Linux

Mediawiki

References · 6

• https://osv.dev/vulnerability/CVE-2021-42046 · Vendor Advisory
• https://gerrit.wikimedia.org/r/q/Ib7f9b009730fe0df283cec1169f84c7a83a58b1d · Vendor Advisory
• https://gerrit.wikimedia.org/r/q/Id2204fb5afe591d63764466de35ac0aaa5999983 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42046 · Security Note
• https://osv.dev/vulnerability/BIT-mediawiki-2021-42046 · Vendor Advisory
• https://phabricator.wikimedia.org/T286385 · Vendor Advisory