Atomic Edge analysis of CVE-2026-24557 (metadata-based):
This vulnerability allows unauthenticated attackers to extract sensitive user or configuration data from the Contact Form 7 GetResponse Extension plugin for WordPress. The plugin’s integration components expose information to unauthorized actors. The CVSS 5.3 score reflects a moderate impact information disclosure vulnerability with network attack vector and no authentication requirements.

Atomic Edge research identifies the root cause as improper access control on a WordPress endpoint. The CWE-200 classification indicates the plugin likely exposes sensitive data through an AJAX handler, REST API endpoint, or admin interface without proper capability checks. This inference stems from the WordPress plugin architecture pattern where extensions commonly register AJAX actions for both authenticated and unauthenticated users via wp_ajax_nopriv hooks. The vulnerability description confirms unauthenticated access to sensitive data, suggesting missing or insufficient authorization verification before data retrieval operations.

Exploitation involves sending HTTP requests to specific WordPress endpoints that the plugin registers. The most probable attack vector targets the plugin’s AJAX handlers at /wp-admin/admin-ajax.php with action parameters containing the plugin slug or related identifiers. Attackers could send POST requests with action=cf7_getresponse_* or similar patterns to trigger data disclosure functions. Alternative vectors include direct access to plugin PHP files in /wp-content/plugins/contact-form-7-getresponse-extension/ or REST API endpoints at /wp-json/cf7-getresponse/*. Without authentication, these requests return sensitive configuration data, API keys, or user information stored by the plugin.

Remediation requires implementing proper authorization checks on all data retrieval endpoints. The plugin must verify current_user_can() capabilities before processing sensitive operations. WordPress AJAX handlers should validate nonces for state-changing operations and implement strict capability checks for data exposure functions. The fix should remove unauthenticated access to sensitive endpoints or implement robust authentication mechanisms. Plugin developers should audit all wp_ajax_nopriv registrations and ensure they don’t expose confidential data.

Successful exploitation exposes sensitive plugin configuration data, potentially including GetResponse API keys, integration settings, and user information collected through contact forms. Attackers could harvest this data for further attacks against the GetResponse platform or use exposed API keys to manipulate mailing lists. The information disclosure could facilitate additional attacks against the WordPress installation or connected services. While no direct privilege escalation or remote code execution occurs, the exposed data significantly increases the attack surface.