What the vulnerability does
01Description
The Cloud SAML SSO plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'set_organization_settings' action of the csso_handle_actions() function in all versions up to, and including, 1.0.19. The handler reads client-supplied POST parameters for organization settings and passes them directly to update_option() without any check of the user’s capabilities or a CSRF nonce. This makes it possible for unauthenticated attackers to change critical configuration (including toggling signing and encryption), potentially breaking the SSO flow and causing a denial-of-service.
Explanation of Vulnerability in Simple Terms
02Summary
Cloud SAML SSO versions up to 1.0.19 lack proper authorization checks, allowing unauthenticated attackers to modify data or disrupt service availability. The vulnerability requires no user interaction and can be exploited over the network. Organizations using this plugin should update immediately to a patched version.
What an attacker can do
03Attacker Capabilities
Modify or delete data and degrade service availability without authentication.
Potential impact on your site
04Site Impact
Unauthorized users can alter site content, settings, or user data, and cause service disruptions.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
September 6, 2025
CVE published
April 8, 2026
Record updated
