Deserialization of untrusted data in wpeverest Everest Forms – Contact Form, Payment…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| wpeverest | Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder | up to 3.1.1 | — | No fix listed | CNA |
- Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder Vendorwpeverest Affected up to 3.1.1 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-3439
- 2026-10-03 Alias added: GHSA-jq7g-h856-ccpg
References
More wpeverest Everest Forms vulnerabilities
- TI-2025-00958 Everest Forms <= 3.0.9.4 - Unauthenticated Arbitrary File Upload, Read, and Deletion CVSS 3.1CRITICAL 9.8
- TI-2024-07919 Everest Forms < 3.0.3.1 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.8
- TI-2024-12173 Everest Forms < 3.0.8.1 - Admin+ Stored XSS CVSS 3.1LOW 3.5
- TI-2019-10207 A SQL injection vulnerability exists in WPEverest Everest Forms plugin for WordPress… CVSS 3.1CRITICAL 9.8
- TI-2025-05353 Everest Forms (Pro) <= 1.9.4 - Unauthenticated Path Traversal to Arbitrary File Deletion CVSS 3.1HIGH 7.5
- TI-2024-01688 Everest Forms <= 2.0.7 - Unauthenticated Server-Side Request Forgery via font_url CVSS 3.1HIGH 7.2
Sources
- CVE-2025-3439 · CVE Program
- CVE-2025-3439 · NVD
- FIRST EPSS
- GHSA-jq7g-h856-ccpg · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences