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PHP object injection in Everest Forms for WordPress (all versions ≤3.4.3) allows unauthenticated remote attackers to achieve critical system compromise. Attackers submit malicious serialized payloads through any public form field, which persist through sanitization into the wp_evf_entrymeta database table. When administrators view form entries, unsafe unserialize() without class restrictions processes the payload, enabling arbitrary code execution. CVSS 9.8 (Critical) reflects network-accessible
PHP object injection in Everest Forms for WordPress (all versions ≤3.4.3) allows unauthenticated remote attackers to achieve critical system compromise. Attackers submit malicious serialized payloads through any public form field, which persist through sanitization into the wp_evf_entrymeta database table. When administrators view form entries, unsafe unserialize() without class restrictions processes the payload, enabling arbitrary code execution. CVSS 9.8 (Critical) reflects network-accessible