PT-2026-31042 · Wikimedia Foundation · Mediawiki - Globalwatchlist Extension

Somerandomdeveloper · Published 2026-04-07 · Updated 2026-04-08 · CVE-2026-39933

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions The Wikimedia Foundation Mediawiki - GlobalWatchlist Extension (affected versions not specified)

Description A cross-site scripting (XSS) issue exists in The Wikimedia Foundation Mediawiki - GlobalWatchlist Extension. This allows for XSS attacks. The issue affects non-release branches.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-39933

Affected Products

Mediawiki - Globalwatchlist Extension

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-39933 · Security Note
• https://twitter.com/VulmonFeeds/status/2041691249493541144 · Twitter Post
• https://twitter.com/ctiwatchcloud/status/2041848548329713777 · Twitter Post
• https://twitter.com/CVEnew/status/2041711859150249989 · Twitter Post
• https://phabricator.wikimedia.org/T418179 · Note
• https://gerrit.wikimedia.org/r/q/I1fc7b7e1d234b0aaf9f7d782a65da1451577587e · Note
• https://twitter.com/0dayPublishing/status/2041639541409198555 · Twitter Post