WordPress · Wp User Frontend · CVE-2026-5459
**Name of the Vulnerable Software and Affected Versions**
User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration versions prior to 4.3.2
**Description**
An Insecure Direct Object Reference (IDOR) exists in the `payment page()` function. This issue occurs because of missing validation on the `user id` variable, which is controlled by the user. Unauthenticated attackers can exploit this to activate a free subscription pack for any user on the site, which overwrites existing paid subscriptions and results in the loss of paid features.
**Recommendations**
Update User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration to version 4.3.2 or later.
As a temporary workaround, restrict access to the `payment page()` function until the update is applied.