alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Fortinet FortiWeb Out of Bounds Access via HTTP Cookie (CVE-2025-52970)"; flow:established,to_server; http.uri; content:"/api/"; startswith; http.cookie; content:"APSCOOKIE_FWEB_"; fast_pattern; content:"Era|3d|"; pcre:"/^[2-9](?:$|\x26)/R"; content:"Payload|3d|"; content:"AuthHash|3d|"; reference:url,pwner.gg/blog/2025-08-13-fortiweb-cve-2025-52970; reference:cve,2025-52970; classtype:web-application-attack; sid:2064933; rev:1; metadata:affected_product FortiWeb, attack_target Server, tls_state TLSDecrypt, created_at 2025_09_25, cve CVE_2025_52970, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_09_25, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)