Update Attribute.php
Update Attribute.php

According to https://cve.mitre.org/news/archives/2014/news.html#jan152014_New_CVE_ID_Format_in_Effect_as_of_January_1_2014 the four-fixed-digits requirement has been dropped
SteveClement/MISP,devnull-/MISP,MISP/MISP,FIRSTdotorg/MISP,TheDr1ver/MISP,FloatingGhost/MISP,SteveClement/MISP,SteveClement/MISP,Rafiot/MISP,devnull-/MISP,SteveClement/MISP,MISP/MISP,Rafiot/MISP,MISP/MISP,devnull-/MISP,devnull-/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,Rafiot/MISP,MISP/MISP,SteveClement/MISP,FIRSTdotorg/MISP,MISP/MISP,TheDr1ver/MISP,Rafiot/MISP,TheDr1ver/MISP,FloatingGhost/MISP,TheDr1ver/MISP