CVE-2025-61657 Cross-site scripting in Vector
Cross-site scripting in the Vector skin allows attackers to inject scripts, potentially leading to session hijacking or malicious actions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-61657?
CVE-2025-61657 is a cross-site scripting vulnerability in Wikimedia Foundation Vector, published on 3 Feb 2026. An attacker needs administrator access to exploit it, 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 Vector. This vulnerability is associated with program files resources/skins.Vector.Js/stickyHeader.Js.
This issue affects Vector: from * before 1.43.4, 1.44.1.
Weakness: CWE-79
Which versions are affected by CVE-2025-61657?
How do I fix CVE-2025-61657?
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-2025-61657 being exploited?
There is no known exploitation of CVE-2025-61657 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-61657, GHSA-gx5g-5pq5-7v27, UBUNTU-CVE-2025-61657.