PT-2026-31011 · Mediawiki+1 · Mediawiki+1

Somerandomdeveloper · Published 2026-04-07 · Updated 2026-04-08 · CVE-2026-39837

Positive Technologies (AI Summary)

CVSS v4.0

6.3

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

Name of the Vulnerable Software and Affected Versions MediaWiki - Cargo Extension versions prior to 3.8.7

Description A Stored Cross-Site Scripting (XSS) issue exists in the MediaWiki - Cargo Extension due to improper neutralization of script-related HTML tags. This allows for the injection of malicious scripts into web pages.

Recommendations Update MediaWiki - Cargo Extension to version 3.8.7 or later.

Fix

XSS

Weakness Enumeration

CWE-80

Related Identifiers

CVE-2026-39837

Affected Products

Cargo Extension

Mediawiki

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-39837 · Security Note
• https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1237979 · Patch
• https://phabricator.wikimedia.org/T416402 · Vendor Advisory
• https://twitter.com/CVEnew/status/2041711896827719710 · Twitter Post