CVE-2026-18345 Missing authorization in WP User Manager – User Profile Builder & Membership
Authenticated subscribers can hijack Stripe integration by exploiting missing authorization checks in the callback function, redirecting payments to their own accounts.
- 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-2026-18345?
CVE-2026-18345 is a medium-severity missing authorization vulnerability in wpusermanager WP User Manager – User Profile Builder & Membership, published on 22 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The WP User Manager plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the Connect::complete() function in versions up to, and including, 2.9.18. The function is registered on the admin_init hook (which fires for every authenticated user that reaches /wp-admin/, including Subscribers) and performs no current_user_can() or nonce verification before fetching Stripe credentials from the external WPUM connect service and writing them (publishable key, secret key, gateway mode, and connected Stripe account ID) into the wpum_settings option via wpum_update_option()/update_option(). This makes it possible for authenticated attackers, with Subscriber-level access and above, to hijack the site's Stripe integration by completing their own Stripe Connect OAuth flow and then invoking the callback on the target site, causing all subsequent Stripe payments to be routed to the attacker's Stripe account.
Weakness: CWE-862
Which versions are affected by CVE-2026-18345?
How do I fix CVE-2026-18345?
No fix has been published for CVE-2026-18345 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-2026-18345 being exploited?
There is no known exploitation of CVE-2026-18345 in the wild and no public exploit code.
Sources
Also known as GHSA-9596-j6mw-33fx.