CVE-2026-90951 Paid Member Subscriptions < 3.1.0 - Unauthenticated In-Flight Checkout State Deletion via pms_process_payment
Unauthenticated attackers can delete other users' checkout states by exploiting missing authorization in the payment processing action.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90951?
CVE-2026-90951 is a low-severity missing authorization vulnerability in Unknown Paid Membership Subscriptions, published on 23 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Paid Membership Subscriptions WordPress plugin before 3.1.0 does not bind one of its unauthenticated payment actions to the requesting user, allowing someone who holds another member's in-flight payment identifier to delete that member's checkout state.
Weakness: CWE-863
Which versions are affected by CVE-2026-90951?
How do I fix CVE-2026-90951?
No fix has been published for CVE-2026-90951 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-2026-90951 being exploited?
There is no known exploitation of CVE-2026-90951 in the wild and no public exploit code.
Sources
Also known as GHSA-rxfw-g454-gj22.