CVE-2026-22711Public exploitNetwork attack vector

Stored XSS via unvalidated system-message URLs

Published Apr 7, 2026 · Updated Apr 7, 2026

Stored XSS in Wikimedia WikiLove allows remote authenticated users with editinterface permission to execute JavaScript in visitors' browsers. WikiLoveDialog builds links by replacing strings inside HTML with system-message values and accepts javascript: and attribute-breaking URL syntax without protocol validation. An attacker must be able to edit protected interface messages, while a visitor must enable WikiLove and open or preview the affected dialog; execution is confined to that visitor's browser context.

CVSS severity6.9
Medium
EPSS probability0.29%
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 WikiLove allows remote authenticated users with editinterface permission to execute JavaScript in visitors' browsers. WikiLoveDialog builds links by replacing strings inside HTML with system-message values and accepts javascript: and attribute-breaking URL syntax without protocol validation. An attacker must be able to edit protected interface messages, while a visitor must enable WikiLove and open or preview the affected dialog; execution is confined to that visitor's browser context.

The record

CVE
CVE-2026-22711
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-87, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.9The Wikimedia FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-87Improper Neutralization of Alternate XSS Syntax
T1059.007Command and Scripting Interpreter: JavaScript

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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