CVE-2025-61656 XSS when pasting into VE

None 0.0 Published 3 Feb 2026 Updated 3 Feb 2026

Cross-site scripting vulnerability in VisualEditor allows attackers to execute arbitrary scripts via pasted content, affecting MediaWiki installations.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2025-61656?

CVE-2025-61656 is a cross-site scripting vulnerability in Wikimedia Foundation VisualEditor, published on 3 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation VisualEditor. This vulnerability is associated with program files src/ce/ve.Ce.ClipboardHandler.Js.

This issue affects VisualEditor: from * before 1.39.14, 1.43.4, 1.44.1.

Weakness: CWE-79

Which versions are affected by CVE-2025-61656?

It affects 1 product.

Products include Mediawiki Visual Editor.

How do I fix CVE-2025-61656?

Upgrade to a fixed version.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-61656 being exploited?

There is no known exploitation of CVE-2025-61656 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2025-61656, GHSA-5499-9jhv-ccm9, UBUNTU-CVE-2025-61656.