CVE-2025-9628 Overview
CVE-2025-9628 affects the AMO.CRM integration plugin for WordPress in all versions up to and including 1.0.1. The plugin fails to perform proper nonce validation in the settings_page function, exposing it to Cross-Site Request Forgery (CSRF) attacks [CWE-352]. Unauthenticated attackers can modify sensitive integration settings by tricking a site administrator into clicking a crafted link. Affected settings include the AMO.CRM API URL, login credentials, and API hash key. Successful exploitation redirects lead data and credentials to attacker-controlled infrastructure.
Critical Impact
Attackers can hijack AMO.CRM API connection settings on vulnerable WordPress sites, redirecting lead data and credentials through attacker-controlled endpoints without authentication.
Affected Products
- WordPress plugin leads-for-amo-crm (AMO.CRM integration) versions 1.0.1 and earlier
- WordPress sites with the AMO.CRM integration plugin installed and active
- Administrator sessions of sites running the vulnerable plugin
Discovery Timeline
- 2025-09-11 - CVE-2025-9628 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-9628
Vulnerability Analysis
The vulnerability resides in the plugin's settings handler. The settings_page function processes administrative configuration updates without verifying a WordPress nonce token. Nonces exist specifically to bind a form submission to an authenticated user session and prevent forged cross-origin requests.
Because the plugin omits or incorrectly implements the wp_verify_nonce or check_admin_referer check, any HTTP request that arrives with a valid administrator session cookie is treated as legitimate. An attacker who crafts a malicious page or link can cause the administrator's browser to submit that request silently.
User interaction is required — the administrator must be authenticated to the WordPress site and must visit the attacker's page or click the attacker's link. The Wordfence advisory documents the flaw in the plugin source at amocrmleads.php line 64 and main.php line 10.
Root Cause
The root cause is missing CSRF protection [CWE-352] on a state-changing settings endpoint. WordPress provides a nonce framework, but the plugin's settings_page function does not invoke it before writing new values for the API URL, login, and hash key. Any authenticated administrator request reaching the endpoint is accepted regardless of origin.
Attack Vector
The attack executes over the network and requires no privileges from the attacker. The attacker hosts a page containing an auto-submitting HTML form or an image tag pointing at the vulnerable settings endpoint. When a logged-in administrator loads the attacker's page, the browser submits the forged request with valid session cookies. The plugin persists the attacker-supplied API URL, login, and hash key, causing subsequent lead submissions and CRM traffic to flow through the attacker's infrastructure.
See the Wordfence Vulnerability Report and the WordPress Plugin Code Review for the vulnerable code path.
Detection Methods for CVE-2025-9628
Indicators of Compromise
- Unexpected changes to the AMO.CRM API URL, login, or hash key in the plugin settings
- WordPress wp_options rows for the AMO.CRM integration containing unfamiliar domains or credentials
- Outbound HTTP requests from the WordPress host to non-AMO.CRM domains for lead submissions
- Referer headers in web server logs showing external origins immediately preceding settings updates
Detection Strategies
- Audit the plugin's stored settings against a known-good baseline and alert on drift
- Inspect access logs for POST or GET requests to the AMO.CRM plugin settings endpoint that lack an in-site Referer or Origin header
- Enable a Web Application Firewall rule requiring a valid WordPress nonce parameter on plugin admin actions
Monitoring Recommendations
- Log all administrator authenticated actions and correlate settings changes with the originating IP and Referer
- Monitor outbound DNS and HTTP traffic from the WordPress server for new destinations that receive form submissions
- Alert on modifications to WordPress options table rows associated with the AMO.CRM integration
How to Mitigate CVE-2025-9628
Immediate Actions Required
- Deactivate the AMO.CRM integration plugin until a patched version is available
- Rotate the AMO.CRM API credentials and hash key if the plugin was active on an internet-exposed site
- Review the plugin's current stored settings and restore known-good values for the API URL and credentials
- Restrict administrator access to trusted networks and require reauthentication for /wp-admin sessions
Patch Information
At the time of NVD publication, no fixed version had been indexed. Administrators should monitor the plugin page on WordPress.org and the Wordfence Vulnerability Report for a release that adds wp_verify_nonce or check_admin_referer calls to the settings_page function.
Workarounds
- Remove or deactivate the leads-for-amo-crm plugin until a patch is available
- Deploy a Web Application Firewall rule that blocks POST requests to the plugin settings endpoint without a valid WordPress nonce parameter
- Instruct administrators to log out of WordPress before browsing untrusted sites and to use a dedicated browser profile for admin tasks
- Apply the SameSite=Strict attribute to the WordPress authentication cookies where feasible to limit cross-site cookie transmission
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
