fix: XSS vulnerability in a malicious feed provider
fix: XSS vulnerability in a malicious feed provider

Thanks to Emanuele Gentili from tigersecurity.pro for reporting this vulnerability

SteveClement/MISP,SteveClement/MISP,TheDr1ver/MISP,devnull-/MISP,FloatingGhost/MISP,TheDr1ver/MISP,FIRSTdotorg/MISP,TheDr1ver/MISP,SteveClement/MISP,MISP/MISP,FIRSTdotorg/MISP,cristianbell/MISP,Rafiot/MISP,cristianbell/MISP,SteveClement/MISP,SteveClement/MISP,cristianbell/MISP,Rafiot/MISP,FIRSTdotorg/MISP,Rafiot/MISP,Rafiot/MISP,devnull-/MISP,TheDr1ver/MISP,FloatingGhost/MISP,devnull-/MISP,MISP/MISP,FIRSTdotorg/MISP,cristianbell/MISP,devnull-/MISP,MISP/MISP,crruthe/MISP,MISP/MISP,crruthe/MISP,FloatingGhost/MISP,MISP/MISP,crruthe/MISP,FloatingGhost/MISP,crruthe/MISP