CVE-2024-32703: ARForms Path Traversal Vulnerability

CVE-2024-32703 Overview

CVE-2024-32703 is a path traversal vulnerability in the ARForms WordPress plugin developed by reputeinfosystems. The flaw affects all versions of ARForms up to and including 6.4. Authenticated attackers with subscriber-level privileges can traverse directory boundaries and delete arbitrary files on the WordPress host. Patchstack tracks this issue as an arbitrary file deletion vulnerability rooted in improper limitation of a pathname to a restricted directory [CWE-22].

Critical Impact
A low-privileged subscriber account can delete arbitrary files on the WordPress server, including wp-config.php, which can lead to site takeover once the setup wizard is reinitialized.

Affected Products

ARForms WordPress plugin versions up to and including 6.4
WordPress sites using reputeinfosystems/arforms with subscriber registration enabled
Any deployment exposing the ARForms file-handling endpoints to authenticated users

Discovery Timeline

2024-06-09 - CVE-2024-32703 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in the NVD database

Technical Details for CVE-2024-32703

Vulnerability Analysis

ARForms exposes a file-handling action reachable through the WordPress AJAX interface. The endpoint accepts a user-supplied path parameter and passes it to a filesystem deletion routine without normalizing or restricting the target directory. An authenticated subscriber can submit a crafted value containing traversal sequences such as ../ to escape the plugin's intended upload directory. The routine then removes the referenced file from any location the PHP process can write to.

The attack requires only subscriber privileges, which are commonly granted on sites with open user registration. No user interaction beyond the attacker's own request is needed. Successful exploitation compromises integrity and availability of the WordPress installation, while confidentiality is not directly affected.

Root Cause

The root cause is missing validation of a filename or path parameter before it reaches a file deletion call. The plugin trusts the client-supplied path and does not enforce a whitelist of allowed directories, does not resolve the canonical path, and does not reject traversal sequences. This maps to CWE-22, Improper Limitation of a Pathname to a Restricted Directory.

Attack Vector

Exploitation is remote and network-based. An attacker authenticates as a subscriber, then sends an authenticated POST request to the vulnerable ARForms AJAX handler with a path parameter containing ../ sequences pointing at a target file such as wp-config.php. Deleting wp-config.php causes WordPress to enter setup mode on the next request, allowing the attacker to reconfigure the site against an attacker-controlled database and achieve full compromise. See the Patchstack Advisory: ARForms Plugin Vulnerability for additional technical context.

Detection Methods for CVE-2024-32703

Indicators of Compromise

Unexpected deletion of core WordPress files such as wp-config.php, .htaccess, or theme and plugin files
WordPress unexpectedly presenting the installation wizard at /wp-admin/install.php
Subscriber-role accounts issuing POST requests to ARForms AJAX endpoints under admin-ajax.php
File paths containing ../ sequences in web server access logs targeting ARForms actions

Detection Strategies

Alert on admin-ajax.php requests where the action parameter references ARForms handlers and the request body contains traversal patterns such as ../ or URL-encoded %2e%2e%2f.
Correlate subscriber-role authentication events with subsequent file deletion or WordPress recovery activity.
Baseline the plugin's normal file operations under wp-content/uploads/ and flag deletions outside that directory tree.

Monitoring Recommendations

Enable file integrity monitoring on WordPress core files, wp-config.php, and installed plugin directories.
Forward WordPress access and PHP error logs to a centralized platform for path-traversal pattern searches.
Track creation of new administrator accounts immediately following anomalous file deletions.

How to Mitigate CVE-2024-32703

Immediate Actions Required

Update ARForms to a version later than 6.4 as soon as the vendor patch is applied on all WordPress sites.
Disable or restrict new user registration on WordPress sites running ARForms until the plugin is patched.
Audit existing subscriber accounts and remove any that were not explicitly created by administrators.
Verify the integrity of wp-config.php and other core files, restoring from known-good backups if tampering is detected.

Patch Information

According to the Patchstack Vulnerability Details: ARForms Plugin, the issue affects ARForms through version 6.4. Administrators should apply the latest vendor release that addresses CVE-2024-32703 and confirm the installed version in the WordPress plugins screen after upgrade.

Workarounds

Deactivate and remove the ARForms plugin until a patched version is installed if the plugin is not in active use.
Deploy a web application firewall rule that blocks requests to admin-ajax.php containing ../ or URL-encoded traversal sequences.
Enforce filesystem permissions so the PHP process cannot delete files outside wp-content/uploads/.

bash

# Example ModSecurity rule to block traversal payloads against ARForms AJAX actions
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
  "chain,phase:2,deny,status:403,id:1003203,msg:'ARForms path traversal attempt (CVE-2024-32703)'"
  SecRule ARGS "@rx (\.\./|%2e%2e%2f|%2e%2e/)" \
    "t:none,t:urlDecodeUni,t:lowercase"