What the vulnerability does
01Description
The OAuth Single Sign On – SSO (OAuth Client) plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 6.26.14. This is due to missing capability checks and authentication verification on the OAuth redirect functionality accessible via the 'oauthredirect' option parameter. This makes it possible for unauthenticated attackers to set the global redirect URL option via the redirect_url parameter granted they can access the site directly.
Explanation of Vulnerability in Simple Terms
02Summary
The OAuth Single Sign On plugin for WordPress contains a missing authorization check that allows unauthenticated attackers to modify data through the plugin's functionality. No authentication is required to exploit this vulnerability. The integrity of user data or plugin settings could be compromised. Update to a version newer than 6.26.14.
What an attacker can do
03Attacker Capabilities
Modify plugin data or settings without authentication.
Potential impact on your site
04Site Impact
Attackers can alter OAuth configuration, user data, or plugin behavior without logging in.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
February 6, 2026
CVE published
April 8, 2026
Record updated
