CVE-2025-3439: CWE-502 Deserialization of Untrusted Data in wpeverest Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder
The Everest Forms – Contact Form, Quiz, Survey, Newsletter & Payment Form Builder for WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.1.1 via deserialization of untrusted input from the 'field_value' parameter. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
AI Analysis
Technical Summary
The Everest Forms plugin for WordPress is vulnerable to PHP Object Injection due to unsafe deserialization of the 'field_value' parameter in versions up to 3.1.1. This vulnerability (CWE-502) allows unauthenticated attackers to inject PHP objects. However, exploitation requires the presence of a gadget POP chain in another installed plugin or theme. Without such a POP chain, the vulnerability has no practical impact. The CVSS 3.1 score is 9.8, indicating critical severity with network attack vector, no privileges required, and high impact on confidentiality, integrity, and availability.
Potential Impact
If a suitable POP chain is present via another plugin or theme, an attacker could leverage this vulnerability to delete arbitrary files, retrieve sensitive information, or execute arbitrary code on the affected WordPress site. Without such a POP chain, the vulnerability cannot be exploited to cause harm. No known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, administrators should review installed plugins and themes for known POP chains and consider disabling or removing untrusted or unnecessary components. Monitor vendor channels for updates and apply patches promptly once released.
CVE-2025-3439: CWE-502 Deserialization of Untrusted Data in wpeverest Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder
Description
The Everest Forms – Contact Form, Quiz, Survey, Newsletter & Payment Form Builder for WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.1.1 via deserialization of untrusted input from the 'field_value' parameter. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Everest Forms plugin for WordPress is vulnerable to PHP Object Injection due to unsafe deserialization of the 'field_value' parameter in versions up to 3.1.1. This vulnerability (CWE-502) allows unauthenticated attackers to inject PHP objects. However, exploitation requires the presence of a gadget POP chain in another installed plugin or theme. Without such a POP chain, the vulnerability has no practical impact. The CVSS 3.1 score is 9.8, indicating critical severity with network attack vector, no privileges required, and high impact on confidentiality, integrity, and availability.
Potential Impact
If a suitable POP chain is present via another plugin or theme, an attacker could leverage this vulnerability to delete arbitrary files, retrieve sensitive information, or execute arbitrary code on the affected WordPress site. Without such a POP chain, the vulnerability cannot be exploited to cause harm. No known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, administrators should review installed plugins and themes for known POP chains and consider disabling or removing untrusted or unnecessary components. Monitor vendor channels for updates and apply patches promptly once released.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- Wordfence
- Date Reserved
- 2025-04-08T00:43:09.396Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 699f6b2bb7ef31ef0b54ef5e
Added to database: 2/25/2026, 9:35:39 PM
Last enriched: 4/9/2026, 9:28:31 PM
Last updated: 4/12/2026, 11:10:17 AM
Views: 29
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