Flex Store Users <= 1.1.0 - Unauthenticated Privilege Escalation

Improper Privilege Management
CVE CVE-2025-13619
CVSS Critical (9.8)
Publicly Published December 19, 2025
Last Updated December 20, 2025
Researcher シルAsuna
Description

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.

References

1 affected software package

Software Type Plugin
Software Slug flex-store-user (view on wordpress.org)
Patched? No
Affected Version
  • <= 1.1.0
Patched Version
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