CVE-2024-43340: Advanced Form Integration CSRF Vulnerability

CVE-2024-43340 Overview

CVE-2024-43340 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the Advanced Form Integration plugin for WordPress, developed by Nasirahmed. The flaw impacts all plugin versions up to and including 1.89.4. An attacker can craft a malicious web page that, when visited by an authenticated WordPress user, triggers unintended state-changing requests against the vulnerable plugin. The weakness is classified under CWE-352 — Cross-Site Request Forgery. Successful exploitation requires user interaction such as clicking a link or loading an attacker-controlled page while authenticated to the target site.

Critical Impact
Attackers can trick authenticated WordPress administrators into performing unauthorized actions in the Advanced Form Integration plugin, potentially altering integration configurations without consent.

Affected Products

Advanced Form Integration plugin for WordPress
All versions from n/a through 1.89.4
WordPress sites with the plugin installed and active

Discovery Timeline

2024-08-26 - CVE-2024-43340 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-43340

Vulnerability Analysis

The Advanced Form Integration plugin fails to validate the origin of state-changing HTTP requests. Without a valid anti-CSRF token (WordPress nonce) check on sensitive endpoints, the plugin trusts any authenticated request delivered to it. An attacker can host a crafted page containing a form or script that automatically submits a request to the target WordPress site. If a logged-in administrator visits that page, the browser will send valid session cookies alongside the forged request. The server then processes the action as if the administrator initiated it.

The impact is limited to integrity effects on plugin data, with no direct confidentiality or availability impact recorded. Because the plugin manages third-party integrations for form submissions, unauthorized configuration changes could redirect form data or disable existing integrations.

Root Cause

The root cause is missing or insufficient CSRF protection on one or more plugin request handlers. WordPress plugins are expected to use wp_nonce_field() and check_admin_referer() (or equivalent wp_verify_nonce() checks) on state-changing operations. The absence of these checks in Advanced Form Integration versions up to 1.89.4 allows cross-origin requests to succeed.

Attack Vector

Exploitation requires network access to deliver an attacker-controlled page and requires user interaction from an authenticated victim. A typical attack chain involves phishing an administrator with a link to a page containing a hidden auto-submitting form targeting the vulnerable plugin endpoint. See the Patchstack Vulnerability Report for additional technical context.

No public proof-of-concept exploit is currently available for this vulnerability, and it is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2024-43340

Indicators of Compromise

Unexpected modifications to Advanced Form Integration plugin settings or integration mappings
WordPress audit log entries showing configuration changes from administrator accounts without a corresponding admin console session
HTTP POST requests to plugin endpoints with Referer headers pointing to external, untrusted domains

Detection Strategies

Review web server access logs for requests to Advanced Form Integration endpoints where the Referer header does not match the WordPress site origin
Monitor for administrative actions performed immediately after an administrator visits an external link
Enable WordPress activity logging plugins to record plugin setting changes with timestamps and originating IPs

Monitoring Recommendations

Alert on modifications to plugin option rows in the wp_options table associated with Advanced Form Integration
Track outbound webhook or integration destination changes to detect data exfiltration attempts
Correlate administrator browser sessions with plugin configuration change events to identify anomalous timing

How to Mitigate CVE-2024-43340

Immediate Actions Required

Update the Advanced Form Integration plugin to a version later than 1.89.4 as soon as a patched release is available from the vendor
Restrict WordPress administrator accounts to dedicated browsers or sessions that do not browse untrusted content
Enforce least privilege by auditing which accounts hold administrator or plugin-management capabilities

Patch Information

The vulnerability affects Advanced Form Integration versions from n/a through 1.89.4. Consult the Patchstack advisory for the current fixed version and vendor patch details.

Workarounds

Deactivate the Advanced Form Integration plugin until a patched version is installed if the plugin is not business-critical
Deploy a Web Application Firewall (WAF) rule to block cross-origin POST requests to plugin endpoints by validating Origin and Referer headers
Require administrators to re-authenticate before performing plugin configuration changes and log out of WordPress when not actively administering the site

bash

# Example WAF/nginx snippet to reject cross-origin POSTs to the plugin path
location ~ /wp-admin/admin\.php {
    if ($request_method = POST) {
        if ($http_referer !~* "^https?://your-wordpress-site\.com/") {
            return 403;
        }
    }
}