Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder: Code execution
Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder is affected by code execution. Exploitation requires at least subscriber-level access. Successful exploitation can run attacker-controlled code in the WordPress hosting account.
- Component
- Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder
- Plugin slug
fluentform- Affected
- See vendor advisory
- Safe version
- See mitigation notes
- Published
- Sep 03, 2025
This CVE was published Sep 03, 2025 and is one of 19 known issues for this plugin.
Update, patch or deactivate.
Update Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder to a release outside the affected range, or disable and remove it until a fixed version is available.
No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to PHP Object Injection in versions 5.1.16 to 6.1.1 via deserialization of untrusted input in the parseUserProperties function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject a PHP Object. The additional presence of a POP chain allows attackers to read arbitrary files. If allow_url_include is enabled on the server, remote code execution is possible. While the vendor patched this issue in version 6.1.0, the patch caused a fatal error in the vulnerable code, due to a missing class import, so we consider 6.1.2 to be the most complete and best patched version
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N