alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS vBulletin replaceAdTemplate Pre-Auth RCE (CVE-2025-48828 & CVE-2025-48827)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/ajax/api/ad/replaceAdTemplate"; fast_pattern; http.request_body; content:"template|3d|"; pcre:"/^[^\x26]*?(?:\x3c|\x253[cC])vb(?:\x3a|\x253[aA])if(?:\x20|\x2520)condition\x3d/R"; reference:url,karmainsecurity.com/dont-call-that-protected-method-vbulletin-rce; reference:cve,2025-48828; reference:cve,2025-48827; classtype:web-application-attack; sid:2062621; rev:1; metadata:affected_product vBulletin, attack_target Server, created_at 2025_05_29, cve CVE_2025_48828_CVE_2025_48827, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Critical, tag Exploit, updated_at 2025_05_29, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)