What the vulnerability does
01Description
The WishList Member plugin for WordPress is vulnerable to Privilege Escalation via Missing Authorization in versions up to and including 3.30.1. This is due to the missing capability and nonce check in the ajax_get_screen() function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to supply an arbitrary admin screen identifier via the data[url] parameter, causing the plugin to load and execute the administrative API configuration template without authorization. The rendered HTML, which contains the plugin's plaintext REST API Secret Key, is returned directly to the attacker in the AJAX JSON response. An attacker who obtains this key can authenticate to the WishList Member API, create a new membership level assigned the administrator WordPress role, and register an arbitrary administrator-level user account, resulting in complete site takeover.
Explanation of Vulnerability in Simple Terms
02Summary
Wishlist Member versions 3.30.1 and earlier contain a privilege management flaw that allows authenticated users with low-level access to gain unauthorized control over site functionality. An attacker can read sensitive data, modify content, and disrupt service availability. The vulnerability requires a valid user account but no additional user interaction.
What an attacker can do
03Attacker Capabilities
Read sensitive data, modify site content, and disrupt service availability with a low-privilege user account.
Potential impact on your site
04Site Impact
Compromised user accounts can escalate privileges and access or modify protected member data and site settings.
Conditions required to exploit
05Prerequisites
Attacker must have a valid low-privilege user account on the site; no user interaction required.
Key dates
06Disclosure timeline
May 23, 2026
CVE published
May 26, 2026
Record updated
