CVE-2026-4888 Missing authorization in Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder
Authenticated subscribers can send arbitrary test emails due to missing capability checks in the Everest Forms WordPress plugin.
- 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-2026-4888?
CVE-2026-4888 is a medium-severity missing authorization vulnerability in wpeverest Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder, published on 27 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder plugin for WordPress is vulnerable to unauthorized email sending due to a missing capability check on the send_test_email() function in all versions up to, and including, 3.4.7. This makes it possible for authenticated attackers, with Subscriber-level access and above, to send test emails to arbitrary addresses from the server.
Weakness: CWE-862
Which versions are affected by CVE-2026-4888?
How do I fix CVE-2026-4888?
No fix has been published for CVE-2026-4888 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-2026-4888 being exploited?
There is no known exploitation of CVE-2026-4888 in the wild and no public exploit code.
Sources
Also known as GHSA-c5fm-9qvp-83r3.