alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Grafana Open Redirect (CVE-2025-4123) M1"; flow:established,to_server; http.request_line; content:"/public"; fast_pattern; pcre:"/^(?:\x2f|%(?:25)?2[fF])(?:(?:\x2e|%(?:25)?2[Ee]){1,2}(?:\x2f|%(?:25)?2[Ff]){1,})+(?:\x5c|%(?:25)?5[cC])/R"; reference:url,nightbloodz.github.io/grafana-CVE-2025-4123/; reference:cve,2025-4123; classtype:web-application-attack; sid:2065929; rev:1; metadata:affected_product Grafana, attack_target Server, tls_state TLSDecrypt, created_at 2025_11_26, cve CVE_2025_4123, deployment Perimeter, deployment Internal, deployment SSLDecrypt, performance_impact Significant, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)