alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS WordPress Plugin Gravity SMTP Unauthenticated REST API (CVE-2026-4020)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/wp-json/gravitysmtp/v1/tests/mock-data"; fast_pattern; content:"page=gravitysmtp-settings"; reference:cve,2026-4020; classtype:web-application-attack; sid:2069346; rev:1; metadata:affected_product Wordpress_Plugins, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_05_19, cve CVE_2026_4020, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag SMTP, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_05_19, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)