Mozilla Firefox designMode deleted object reference

Overview Mozilla Firefox contains a deleted object reference vulnerability. This may allow a remote attacker to execute arbitrary code. Description Mozilla Firefox contains a vulnerability that causes a deleted object to be referenced when designMode is set to "on." When Firefox attempts to use...

Deleted object reference when designMode="on" — Mozilla

Martijn Wargers and Nick Mott each described crashes that were discovered to ultimately stem from the same root cause: attempting to use a deleted controller context when designMode was turned on. This generally results in crashing the browser, but in theory references to deleted objects can be...