Critical flaw found in Firefox, Thunderbird

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Mozilla has released critical updates for Firefox, Thunderbird and its SeaMonkey application suite. Left unpatched, the vulnerabilities could allow hackers to execute cross-site scripting attacks on a user's PC. The affected versions of Firefox are all versions of Firefox 1.0 below 1.5.0.9 and all versions of Firefox 2 below 2.0.0.1. For more details, see this article on CNET or this bulletin from Secuina.