CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
What the vulnerability does
The Groups plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.0 via the 'group_id' parameter of the group_join function due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Subscriber-level access and above, to register for groups other than ones set in the shortcode.
Explanation of Vulnerability in Simple Terms
Groups version 3.7.0 and earlier contains an authorization flaw that allows authenticated users to modify data they should not have access to. An attacker with a low-privilege account can alter information through the application's normal interface without elevated permissions. The vulnerability affects the integrity of stored data but does not expose sensitive information or disrupt availability. Update to version 4.3.0 or later to resolve this issue.
What an attacker can do
Modify data or settings they lack authorization to change via the web interface.
Potential impact on your site
Unauthorized users can alter site data, potentially corrupting content, settings, or user information.
Conditions required to exploit
Attacker must have a valid low-privilege user account and network access to the site.
Key dates
External resources
