The Javascript engine in Mozilla Firefox before 1.5.0.5, Thunderbird before 1.5.0.5, and SeaMonkey before 1.0.3 might allow remote attackers to execute arbitrary code via vectors involving garbage collection that causes deletion of a temporary object that is still being used.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.23
EPSS Ranking 95.7%