What the vulnerability does
01Description
The WP GDPR Cookie Consent plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ninja_gdpr_ajax_actions' AJAX action in versions up to, and including, 1.0.0. This is due to missing capability and nonce checks on the handleAjaxCalls() function, combined with insufficient input sanitization on the gdprConfig values and missing output escaping in the generateCSS() function which echoes stored configuration values directly into a <style> block rendered on wp_head. This makes it possible for authenticated attackers, with subscriber-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
WP GDPR Cookie Consent versions up to 1.0.0 contain a stored cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers, including administrators. The vulnerability affects the plugin's scope across the site, potentially compromising user sessions and data.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers, including admins, to steal sessions or data.
Potential impact on your site
04Site Impact
Authenticated attackers can compromise admin accounts and steal sensitive site data through injected scripts.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WordPress account (e.g., subscriber or contributor role).
Key dates
06Disclosure timeline
June 9, 2026
CVE published
June 9, 2026
Record updated
