CVE-2025-61656Network attack vector

Script execution via unsanitized restored paste attributes

Published Feb 3, 2026 · Updated Feb 3, 2026

Cross-site scripting in Wikimedia Foundation VisualEditor before 1.39.14, 1.43.4, and 1.44.1 allows attackers to execute script via pasted content. ClipboardHandler parses data-ve-attributes from pasted HTML and reapplies the decoded attribute map without sanitizing the restored names and values. An editor must paste attacker-controlled content into VisualEditor; injected script then runs in the editing page's browser context.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Wikimedia Foundation VisualEditor before 1.39.14, 1.43.4, and 1.44.1 allows attackers to execute script via pasted content. ClipboardHandler parses data-ve-attributes from pasted HTML and reapplies the decoded attribute map without sanitizing the restored names and values. An editor must paste attacker-controlled content into VisualEditor; injected script then runs in the editing page's browser context.

The record

CVE
CVE-2025-61656
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
Wikimedia Foundation
Product
VisualEditor
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 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?

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

  1. Affected versionversion=* <1.39.14, 1.43.4, 1.44.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wikimedia Foundation · VisualEditorversion=* <1.39.14, 1.43.4, 1.44.1

Published CVSS scores

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

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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