CVE-2026-4100 Missing authorization in Paid Memberships Pro – Content Restriction, User Registration, & Paid Subscriptions
Authenticated subscribers can delete or modify Stripe webhooks, disrupting payment processing and subscription management in Paid Memberships Pro.
- 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-2026-4100?
CVE-2026-4100 is a high-severity missing authorization vulnerability in strangerstudios Paid Memberships Pro – Content Restriction, User Registration, & Paid Subscriptions, published on 2 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Paid Memberships Pro plugin for WordPress is vulnerable to unauthorized modification and disruption of Stripe webhook configuration in all versions up to, and including, 3.6.5. This is due to missing capability checks on the `wp_ajax_pmpro_stripe_create_webhook`, `wp_ajax_pmpro_stripe_delete_webhook`, and `wp_ajax_pmpro_stripe_rebuild_webhook` AJAX handlers. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete, create, or rebuild the site's Stripe webhook, disrupting all payment processing, subscription renewal synchronization, cancellation handling, and failed payment management.
Weakness: CWE-862
Which versions are affected by CVE-2026-4100?
How do I fix CVE-2026-4100?
No fix has been published for CVE-2026-4100 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-2026-4100 being exploited?
There is no known exploitation of CVE-2026-4100 in the wild and no public exploit code.
Sources
Also known as GHSA-995f-rphp-2rcg.