alert http any any -> $HOME_NET any (msg:"ET EXPLOIT PaperCut MF/NG SetupCompleted Authentication Bypass (CVE-2023-27350)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"service|3d|page/SetupCompleted"; fast_pattern; reference:url,horizon3.ai/attack-research/attack-blogs/papercut-cve-2023-27350-deep-dive-and-indicators-of-compromise/; reference:cve,2023-27350; classtype:attempted-admin; sid:2045130; rev:4; metadata:affected_product PaperCut_NG_MF, attack_target Web_Server, tls_state TLSDecrypt, created_at 2023_04_21, cve CVE_2023_27350, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_10_22, reviewed_at 2024_09_30, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)