fix: [attribute:massTagging] Check for POST data in `post` code path. Fix #5359
fix: [attribute:massTagging] Check for POST data in `post` code path.
Fix #5359

MISP/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP,SteveClement/MISP,FIRSTdotorg/MISP,MISP/MISP,SteveClement/MISP,FIRSTdotorg/MISP,FIRSTdotorg/MISP,MISP/MISP,MISP/MISP,FIRSTdotorg/MISP