CVE-2026-3453 Missing authorization in Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress
Authenticated attackers can cancel or expire any user's subscription by manipulating a parameter, causing loss of paid access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3453?
CVE-2026-3453 is a high-severity missing authorization vulnerability in properfraction Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress, published on 11 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The ProfilePress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.16.11. This is due to missing ownership validation on the change_plan_sub_id parameter in the process_checkout() function. The ppress_process_checkout AJAX handler accepts a user-controlled subscription ID intended for plan upgrades, loads the subscription record, and cancels/expires it without verifying the subscription belongs to the requesting user. This makes it possible for authenticated attackers, with Subscriber-level access and above, to cancel and expire any other user's active subscription via the change_plan_sub_id parameter during checkout, causing immediate loss of paid access for victims.
Weakness: CWE-639
Which versions are affected by CVE-2026-3453?
How do I fix CVE-2026-3453?
No fix has been published for CVE-2026-3453 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-3453 being exploited?
There is no known exploitation of CVE-2026-3453 in the wild and no public exploit code.
Sources
Also known as GHSA-jp3m-m8r2-v4x3.