vulnerability

WordPress Plugin: fluentform: CVE-2025-9260: Deserialization of Untrusted Data

Severity
7
CVSS
(AV:N/AC:L/Au:S/C:C/I:N/A:N)
Published
Sep 2, 2025
Added
Sep 3, 2025
Modified
Sep 8, 2025

Description

The Fluent Forms – Customizable Contact Forms, Survey, Quiz, and 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.

Solution

fluentform-plugin-cve-2025-9260
Title
NEW

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