What the vulnerability does
01Description
The Header Footer Script Adder – Insert Code in Header, Body & Footer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the script adder present in posts in all versions up to, and including, 2.0.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
The Header Footer Script Adder plugin for WordPress contains a cross-site scripting (XSS) vulnerability in versions up to 2.0.5. An authenticated user with low privileges can inject malicious scripts that execute in the context of other users' browsers, potentially affecting site visitors and administrators. The vulnerability allows script injection through the plugin's code insertion functionality.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that runs in other users' browsers, stealing session tokens or performing actions on their behalf.
Potential impact on your site
04Site Impact
Visitors and administrators may have their sessions hijacked or be redirected to malicious sites; site reputation and user data at risk.
Conditions required to exploit
05Prerequisites
Attacker must have a WordPress user account with low-level privileges (e.g., contributor or subscriber role).
Key dates
06Disclosure timeline
December 13, 2025
CVE published
April 8, 2026
Record updated
