PT-2026-31013 · Mediawiki · Cargo Extension+1

Alex44019 · Published 2026-04-07 · Updated 2026-04-08 · CVE-2026-39841

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 flaw exists in the Mediawiki - Cargo Extension that allows for Stored Cross-Site Scripting (XSS). This is due to improper neutralization of script-related HTML tags within a web page. The issue allows an attacker to inject malicious scripts into the application, potentially compromising user accounts or data.

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

Fix

XSS

Weakness Enumeration

CWE-80

CWE-79

Related Identifiers

CVE-2026-39841

Affected Products

Cargo Extension

Mediawiki

References · 5

• https://phabricator.wikimedia.org/T416389 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-39841 · Security Note
• https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1237973 · Patch
• https://twitter.com/CVEnew/status/2041711899856007380 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2041765485558001762 · Twitter Post