alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS better-auth Unauthenticated API Key Creation (CVE-2025-61928)"; flow:established,to_server; http.uri; content:"/api/auth/api-key/create"; fast_pattern; startswith; http.request_body; content:"|22|userId|22|"; content:"|22|name|22|"; http.method; content:"POST"; reference:url,zeropath.com/blog/breaking-authentication-unauthenticated-api-key-creation-in-better-auth-cve-2025-61928; reference:cve,2025-61928; classtype:web-application-attack; sid:2065283; rev:1; metadata:attack_target Server, tls_state TLSDecrypt, created_at 2025_10_21, cve CVE_2025_61928, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_21, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)