alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Microsoft Purview Authorized Server-Side Request Forgery (CVE-2025-21385)"; flow:established,to_server; http.method; content:"POST"; http.host; dotprefix; content:".purview.azure.com"; fast_pattern; http.content_type; content:"application/json"; http.request_body; content:"|22|callback|22 3a|"; reference:url,github.com/Pauloxc6/CVE-2025-21385/; reference:cve,2025-21385; classtype:web-application-attack; sid:2060021; rev:1; metadata:attack_target Server, tls_state TLSDecrypt, created_at 2025_02_10, cve CVE_2025_21385, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2025_02_10, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)