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CVE-2026-39933

Multiple XSS vulnerabilities in GlobalWatchlist

MEDIUM
6.9
CVSS Score
Published: April 7, 2026 at 09:51 PM UTC
Updated: July 21, 2026 at 07:26 PM UTC
1 product affected across 1 vendorGlobalWatchlist

Using Mediawiki - GlobalWatchlist Extension by The Wikimedia Foundation?

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Severity
MEDIUM6.9
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - GlobalWatchlist Extension allows Cross-Site Scripting (XSS).This issue affects non release branches.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

GlobalWatchlist· Wikimedia
60%
v < 1.43
Vendor states this is fixed in 1.43 (unaffected)
Vendor states this is fixed in 1.44 (unaffected)
Vendor states this is fixed in 1.45 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord
https://phabricator.wikimedia.org/T418179
Source: cverecord
https://gerrit.wikimedia.org/r/q/I1fc7b7e1d234b0aaf9f7d782a65da1451577587e

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.9MEDIUMwikimedia-foundation
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-79

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