CVE-2024-37264 Overview
CVE-2024-37264 is a reflected Cross-Site Scripting (XSS) vulnerability affecting the Groundhogg WordPress plugin through version 3.4.2.3. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. An attacker can craft a malicious URL that, when visited by an authenticated user, executes arbitrary JavaScript in the victim's browser session. The issue was published to the NVD on 2024-07-22 and tracked by Patchstack.
Critical Impact
Successful exploitation enables session hijacking, credential theft, and unauthorized actions performed in the context of the victim's WordPress session, with a changed scope affecting both confidentiality and integrity.
Affected Products
- Groundhogg plugin for WordPress — all versions up to and including 3.4.2.3
- WordPress sites running the vulnerable plugin with authenticated administrative users
- Any Groundhogg deployment where users may follow attacker-supplied links
Discovery Timeline
- 2024-07-22 - CVE-2024-37264 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-37264
Vulnerability Analysis
The Groundhogg plugin fails to properly sanitize and encode user-controlled input before reflecting it in HTTP responses. When a victim loads a crafted URL, injected markup and JavaScript render within the trusted origin of the WordPress site. Because the CVSS vector indicates a scope change, injected script can act on resources beyond the vulnerable component, including other administrative pages in the same session. Exploitation requires user interaction, typically a click on an attacker-controlled link delivered via phishing or a third-party referrer.
Root Cause
The root cause is missing or insufficient output encoding on request parameters that are rendered back into the response HTML. The plugin treats attacker-controllable input as safe markup rather than untrusted data, allowing <script> and event-handler payloads to execute. No authentication is required to craft the malicious URL, though the payload runs under whichever user visits it.
Attack Vector
The attack is network-based and reflected. An attacker generates a URL containing a JavaScript payload in a vulnerable Groundhogg request parameter. The attacker then lures an authenticated WordPress user, often an administrator, into visiting the link. On page load, the injected script runs with the privileges of the victim and can exfiltrate cookies, perform CSRF-style actions, or inject persistent backdoors through administrative endpoints.
No verified public exploit code is available. See the Patchstack Vulnerability Analysis for technical details on the affected request flow.
Detection Methods for CVE-2024-37264
Indicators of Compromise
- HTTP request logs containing URL parameters with <script>, onerror=, onload=, or encoded variants targeting Groundhogg endpoints.
- Outbound requests from administrator browsers to unknown domains shortly after visiting a Groundhogg admin page.
- Unexpected creation of WordPress administrator accounts or modifications to Groundhogg funnels and contacts.
Detection Strategies
- Inspect web server access logs for suspicious query strings referencing Groundhogg routes with HTML or JavaScript metacharacters.
- Deploy a Web Application Firewall (WAF) rule set that flags reflected XSS patterns against WordPress plugin endpoints.
- Correlate browser session anomalies, such as unexpected AJAX calls to admin-ajax.php, with recent navigation to crafted URLs.
Monitoring Recommendations
- Alert on WordPress admin role changes, plugin installations, and user creation events from the Groundhogg context.
- Monitor referrer headers for externally originated links landing on Groundhogg admin pages.
- Track EPSS trending for CVE-2024-37264 (currently 0.308%, percentile 21.85) to adjust prioritization if exploitation activity rises.
How to Mitigate CVE-2024-37264
Immediate Actions Required
- Update the Groundhogg plugin to a version later than 3.4.2.3 as published by the vendor.
- Review WordPress administrator accounts and audit recent changes to Groundhogg configuration, funnels, and contact data.
- Educate administrators to avoid clicking unsolicited links that reference the WordPress admin interface.
Patch Information
Refer to the Patchstack Vulnerability Analysis for the fixed version and remediation guidance. Apply the vendor update through the WordPress plugin manager or via WP-CLI as part of a standard patch cycle.
Workarounds
- Restrict access to the WordPress admin interface by IP allowlist until the plugin is updated.
- Deploy a WAF rule to block requests to Groundhogg endpoints containing HTML or JavaScript metacharacters in parameters.
- Enforce a strict Content Security Policy (CSP) that disallows inline scripts on wp-admin pages to limit payload execution.
# Update Groundhogg via WP-CLI to the latest patched release
wp plugin update groundhogg
wp plugin get groundhogg --field=version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
