---
id: CVE-2024-13784
title: >-
  The Contact Form, Survey, Quiz & Popup Form Builder – ARForms plugin for
  WordPress is vulnerable to PHP Object Injection in all versions up to, and
  including, 1.8.5 via deserialization of untrusted input from form submissions
summary: >-
  The Contact Form, Survey, Quiz & Popup Form Builder – ARForms plugin for
  WordPress is vulnerable to PHP Object Injection in all versions up to, and
  including, 1.8.5 via deserialization of untrusted input from form submissions.
  This makes…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-502
published: '2026-08-16'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T23:10:00.233'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-13784'
references:
  - url: 'https://wordpress.org/plugins/arforms-form-builder/'
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/5e0116d6-91c3-4212-9c68-6b706ab09768?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00757
epssPercentile: 0.53525
ingestedAt: '2026-10-02T00:04:54.718Z'
---

## Overview

The Contact Form, Survey, Quiz & Popup Form Builder – ARForms plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.8.5 via deserialization of untrusted input from form submissions. 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.