alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Apache Superset Markdown Component Stored Cross-Site Scripting (CVE-2021-27907) M2"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/superset/save_dash/"; fast_pattern; http.request_body; content:"|22|code|22|"; nocase; pcre:"/^.+(script|onmouse[a-z]+|onkey[a-z]+|onerror|onload|onunload|ondragdrop|onblur|onfocus|onclick|ondblclick|onsubmit|onreset|onselect|onchange|style\x3d)/Ri"; reference:cve,2021-27907; reference:url,lists.apache.org/thread/r2bwgnq45t3y5mmmzz7gsvgnwt9m14r4; classtype:web-application-attack; sid:2059306; rev:1; metadata:affected_product Apache_Superset, attack_target Web_Server, tls_state TLSDecrypt, created_at 2025_01_17, deployment Perimeter, deployment Internal, deployment Datacenter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_01_17, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)