ET WEB_SPECIFIC_APPS Xerox FreeFlow Core External XML Entity Injection Server Side Request Forgery Attempt (CVE-2025-8355)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Xerox FreeFlow Core External XML Entity Injection Server Side Request Forgery Attempt (CVE-2025-8355)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:1;
    content:"/";
    http.request_body;
    content:"|3c 3f|xml|20|version|3d 22|"; startswith; nocase;
    content:"|3c 21|entity|20 25|"; distance:0; nocase;
    content:"SYSTEM|20 22|http"; fast_pattern; distance:0;
    content:"|3a 2f 2f|"; within:4; distance:0;
    reference:url,horizon3.ai/attack-research/attack-blogs/from-support-ticket-to-zero-day/;
    reference:cve,2025-8355;
    classtype:web-application-attack;
    sid:2064002; rev:1;
    metadata:affected_product Xerox, attack_target Server, tls_state plaintext, created_at 2025_08_13, cve CVE_2025_8355, 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;
)