What the vulnerability does
01Description
The Flex Store Users plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.1.0. This is due to the 'fsUserHandle::signup' and the 'fsSellerRole::add_role_seller' functions not restricting what user roles a user can register with. This makes it possible for unauthenticated attackers to supply the 'administrator' role during registration and gain administrator access to the site. Note: The vulnerability can be exploited with the 'fs_type' parameter if the Flex Store Seller plugin is also activated.
Explanation of Vulnerability in Simple Terms
02Summary
Flex Store Users versions 1.1.0 and earlier contain a privilege management flaw that allows unauthenticated attackers to gain full control over the application. The vulnerability requires no user interaction and can be exploited remotely over the network. An attacker can read sensitive data, modify site content, and disrupt service availability.
What an attacker can do
03Attacker Capabilities
Read sensitive data, modify content, and disable the site without needing to log in.
Potential impact on your site
04Site Impact
Complete compromise of the Flex Store Users component and potential exposure of customer and site data.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
December 20, 2025
CVE published
April 8, 2026
Record updated
