CVE-2025-3439 Deserialization in Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder
Unauthenticated attackers can inject PHP objects via untrusted input, potentially leading to code execution or data theft if a POP chain exists.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-3439?
CVE-2025-3439 is a critical unsafe deserialization vulnerability in wpeverest Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder, published on 11 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-502
Which versions are affected by CVE-2025-3439?
It affects 1 product.
Products include Wpeverest Everest Forms.
How do I fix CVE-2025-3439?
No fix has been published for CVE-2025-3439 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-3439 being exploited?
There is no known exploitation of CVE-2025-3439 in the wild and no public exploit code.
Other vulnerabilities in wpeverest Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder
- CVE-2025-1128 Everest Forms <= 3.0.9.4 - Unauthenticated Arbitrary File Upload, Read, and Deletion
- CVE-2019-13575 SQL injection in n/a
- CVE-2025-5927 Everest Forms (Pro) <= 1.9.4 - Unauthenticated Path Traversal to Arbitrary File Deletion
- CVE-2024-1812 Everest Forms <= 2.0.7 - Unauthenticated Server-Side Request Forgery via font_url
- CVE-2025-26841 Cross-site scripting in n/a
Sources
Also known as GHSA-jq7g-h856-ccpg.