Mozilla is warning users and administrators of a critical JavaScript flaw in its Firefox 3.5 browser.
The company said that the problem exists in the browser's JavaScript tool within a component called 'just in time' (JIT). If exploited, the vulnerability could allow an attacker to remotely execute code on a targeted system.
Mozilla further warned that a working exploit has been publically released, increasing the risk of attacks occurring in the wild.
I'm using 3.5.1 right now. Works great.