Cross-site Scripting Vulnerability in Wikimedia Foundation's Vector
CVE-2025-61657

NONE

Key Information:

Vendor

Wikimedia Foundation

Status
Vector
Vendor
CVE Published:
3 February 2026

What is CVE-2025-61657?

A Cross-site Scripting (XSS) vulnerability exists in the Wikimedia Foundation's Vector product, specifically affecting versions prior to 1.43.4 and 1.44.1. This vulnerability arises from improper input handling during the web page generation process, allowing malicious users to inject arbitrary scripts into web pages viewed by other users. This can lead to unauthorized actions being performed on behalf of users, data theft, and other security risks. The affected code resides in the stickyHeader.js file associated with the Vector skin. Organizations using these versions should take immediate steps to upgrade to secure versions to mitigate potential attacks.

Affected Version(s)

Vector * < 1.43.4, 1.44.1

References

https://phabricator.wikimedia.org/T398636

CVSS V4

Score:
Severity:
NONE
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.