What the vulnerability does
01Description
The Insert Headers And Footers plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 3.1.1. This is due to missing or incorrect nonce validation on the 'custom_plugin_set_option' function. This makes it possible for unauthenticated attackers to update arbitrary options on the WordPress site via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. This can be leveraged to update the default role for registration to administrator and enable user registration for attackers to gain administrative user access to a vulnerable site. The 'WPBRIGADE_SDK__DEV_MODE' constant must be set to 'true' to exploit the vulnerability.
Explanation of Vulnerability in Simple Terms
02Summary
Insert Headers And Footers versions 3.1.1 and earlier contain a cross-site request forgery (CSRF) vulnerability. An attacker can craft a malicious webpage that, when visited by a logged-in site administrator, performs unauthorized actions such as modifying site headers or footers without the admin's knowledge or consent. The attack requires the admin to visit the attacker's page while authenticated to the WordPress site.
What an attacker can do
03Attacker Capabilities
Trick a logged-in admin into modifying site headers, footers, or plugin settings without their knowledge.
Potential impact on your site
04Site Impact
Attackers can deface your site's headers/footers or inject malicious content visible to all visitors without your permission.
Conditions required to exploit
05Prerequisites
Admin must visit attacker's webpage while logged into WordPress. No special privileges or complex setup required.
Key dates
06Disclosure timeline
April 19, 2025
CVE published
April 8, 2026
Record updated
