ET WEB_SPECIFIC_APPS FreePBX Recordings.class.php file Parameter Command Injection Attempt (CVE-2026-28287)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri; bsize:15;
content:"/admin/ajax.php";
http.request_body;
content:"file|3d|";
pcre:"/^[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R";
content:"command|3d|";
pcre:"/^(?:convert|gethtml5)/R";
content:"module|3d|recordings"; fast_pattern;
target:dest_ip;
Raw source ET WEB_SPECIFIC_APPS FreePBX Recordings.class.php file Parameter Command Injection Attempt (CVE-2026-28287) · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS FreePBX Recordings.class.php file Parameter Command Injection Attempt (CVE-2026-28287)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:15;
    content:"/admin/ajax.php";
    http.request_body;
    content:"file|3d|";
    pcre:"/^[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R";
    content:"command|3d|";
    pcre:"/^(?:convert|gethtml5)/R";
    content:"module|3d|recordings"; fast_pattern;
    reference:url,attackerkb.com/topics/i5qGi63oCf/cve-2026-28287;
    reference:cve,2026-28287;
    classtype:attempted-admin;
    sid:2068314; rev:1;
    metadata:attack_target Networking_Equipment, tls_state plaintext, created_at 2026_03_17, cve CVE_2026_28287, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_03_17, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)

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