CVE-2025-6596Public exploitNetwork attack vector

Stored XSS via HTML-interpreted portlet labels

Published Feb 2, 2026 · Updated Feb 2, 2026

Stored XSS in Wikimedia Foundation Vector allows remote authenticated users to execute script in visitors' browsers through system messages. The 2022 and legacy portlets.js implementations copy a label's textContent into a wrapper's innerHTML, converting previously inert text into executable markup. Exploitation requires high-privilege rights to edit a relevant system message, and the script runs when a visitor loads a page using the affected skin.

CVSS severity0.0
None
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Wikimedia Foundation Vector allows remote authenticated users to execute script in visitors' browsers through system messages. The 2022 and legacy portlets.js implementations copy a label's textContent into a wrapper's innerHTML, converting previously inert text into executable markup. Exploitation requires high-privilege rights to edit a relevant system message, and the script runs when a visitor loads a page using the affected skin.

The record

CVE
CVE-2025-6596
Published
Feb 2, 2026
Updated
Feb 2, 2026
Vendor
Wikimedia Foundation
Product
Vector
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.40.0 <1.42.7, 1.43.2, 1.44.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Wikimedia Foundation · Vectorversion=>= 1.40.0 <1.42.7, 1.43.2, 1.44.0

Published CVSS scores

0.0Wikimedia FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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