What the vulnerability does
01Description
The WP Responsive Popup + Optin plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to and including 1.4. This is due to the settings form on the admin page (wpo_admin_page.php) lacking nonce generation (wp_nonce_field) and verification (wp_verify_nonce/check_admin_referer). This makes it possible for unauthenticated attackers to update all plugin settings including the 'wpo_image_url' parameter via a forged request, granted they can trick a site administrator into performing an action such as clicking a link.
Explanation of Vulnerability in Simple Terms
02Summary
WP Responsive Popup + Optin versions 1.4 and earlier are vulnerable to cross-site request forgery (CSRF). An attacker can craft a malicious webpage that, when visited by a logged-in site administrator, performs unwanted actions on the site without the admin's knowledge or consent. The attack requires the admin to visit the attacker's page while authenticated to WordPress.
What an attacker can do
03Attacker Capabilities
Perform unwanted actions on the site by tricking an authenticated admin into visiting a malicious webpage.
Potential impact on your site
04Site Impact
An attacker could modify plugin settings, create unwanted popups, or alter site configuration if an admin visits a malicious link.
Conditions required to exploit
05Prerequisites
Site admin must be logged into WordPress and visit an attacker-controlled webpage.
Key dates
06Disclosure timeline
April 22, 2026
CVE published
April 22, 2026
Record updated
