What the vulnerability does
01Description
The CSS & JavaScript Toolbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 12.0.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Explanation of Vulnerability in Simple Terms
02Summary
CSS & JavaScript Toolbox versions 12.0.5 and earlier contain a cross-site scripting (XSS) vulnerability. An authenticated administrator with high privileges can inject malicious scripts that affect other users or the site scope. The vulnerability requires specific attack conditions and does not allow code execution or data theft, but can deface content or redirect users.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers or affect site functionality.
Potential impact on your site
04Site Impact
A compromised admin account can inject scripts affecting site visitors or other admins; update the plugin immediately.
Conditions required to exploit
05Prerequisites
Attacker must be authenticated as a high-privilege administrator; no user interaction required.
Key dates
06Disclosure timeline
November 1, 2025
CVE published
April 8, 2026
Record updated
