If you use Firefox as your browser it looks like you should stick with your known and trusted websites if you can until Firefox 3.0.8 is released with the fix, probably next week.

via Exploit code sends Mozilla scrambling to fix Firefox.Mozilla’s security response team is scrambling to ready a patch for what appears to be a serious security flaw affecting Firefox.

The vulnerability, released alongside proof-of-concept code on several security sites, could lead to malicious code execution attacks if a Firefox user is lured to a Web site rigged with exploits. It affects all versions of the open-source browser, including the newest Firefox 3.0.7.

[...] Mozilla has started an investigation of the issue, which is described in a bug report as “critical.”

will be released sometime next week with a fix for this vulnerability.

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