Medium severity · published May 27, 2026
CVE-2026-4888
Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder <= 3.4.7 - Missing Authorization to Authenticated (Subscriber+) Email Sending
4.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EF
Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder · wpeverest
through 3.4.7 · source: vendor
Affected product
EF
Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder
wpeverest
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4888
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4888
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.4/includes/class-evf-ajax.php#L1174
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/8bced7df-3e1a-4d7b-9ad0-64be5e18900f?source=cve
More from Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder
9.8
CVE-2026-3296
Everest Forms <= 3.4.3 - Unauthenticated PHP Object Injection via Form Entry Metadata
9.8
CVE-2025-3439
Everest Forms – Contact Form, Quiz, Survey, Newsletter & Payment Form Builder for WordPress <= 3.1.1 - Unauthenticated PHP Object Injection
9.8
CVE-2025-1128
Everest Forms <= 3.0.9.4 - Unauthenticated Arbitrary File Upload, Read, and Deletion
8.1
CVE-2026-5478
Everest Forms <= 3.4.4 - Unauthenticated Arbitrary File Read and Deletion via Upload Field 'old_files' Parameter
7.2
CVE-2024-1812
Everest Forms <= 2.0.7 - Unauthenticated Server-Side Request Forgery via font_url