Double free vulnerability in nsVCard.cpp in Mozilla Thunderbird before 1.5.0.4 and SeaMonkey before 1.0.2 allows remote attackers to cause a denial of service (hang) and possibly execute arbitrary code via a VCard that contains invalid base64 characters.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.072
EPSS Ranking 91.2%