alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Xerox FreeFlow Core Arbitrary File Upload/Directory Traversal Attempt (CVE-2025-8356)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:1; content:"/"; http.content_type; content:"multipart/related"; http.request_body; content:"application/vnd.cip4-jmf+xml"; fast_pattern; content:"Content-Disposition|3a 20|attachment|3b 20|filename|3d 22|"; distance:0; pcre:"/^[^\x26]*?(?:(?:\x2e|%2[Ee]){1,2}(?:\x2f|\x5c|%5[Cc]|%2[Ff]){1,}){2,}/R"; reference:url,horizon3.ai/attack-research/attack-blogs/from-support-ticket-to-zero-day/; reference:cve,2025-8536; reference:cve,2025-8356; classtype:attempted-admin; sid:2064001; rev:1; metadata:affected_product Xerox, attack_target Server, tls_state plaintext, created_at 2025_08_13, cve CVE_2025_8356, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_08_13, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)