CVE-2024-4157

HIGH

Fluent Forms <= 5.1.15 - Authenticated PHP Object Injection

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2024-4157. PoCs published by Ch4os1.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2024-4157, which chains an SSRF vulnerability with an RCE to achieve a reverse shell on Havoc C2 servers. The exploit registers a fake agent, opens a socket on the teamserver, and writes data to execute a reverse shell.

Description

The Contact Form Plugin by Fluent Forms for Quiz, Survey, and Drag & Drop WP Form Builder plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 5.1.15 via deserialization of untrusted input in the extractDynamicValues function. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code. Successful exploitation requires the attacker to have "View Form" and "Manage Form" permissions, which must be explicitly set by an administrator. However, this requirement can be bypassed when this vulnerability is chained with CVE-2024-2771.

Exploits (1)

nomisec WORKING POC 1 stars
by Ch4os1 · poc
https://github.com/Ch4os1/CVE-2024-4157-SSRF-RCE-Reverse-Shell

This repository contains a functional exploit for CVE-2024-4157, which chains an SSRF vulnerability with an RCE to achieve a reverse shell on Havoc C2 servers. The exploit registers a fake agent, opens a socket on the teamserver, and writes data to execute a reverse shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Havoc C2 v0.7
Auth required
Prerequisites: Valid credentials for the Havoc C2 server · Network access to the target server
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Scores

CVSS v3 7.5
EPSS 0.0070
EPSS Percentile 48.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-502
Status published
Products (2)
fluentforms/contact_form < 5.1.16
techjewel/Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder < 5.1.15
Published May 22, 2024
Tracked Since Feb 18, 2026