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Dec 16 2025 GhostPoster attacks hide malicious JavaScript in Firefox addon logos

Source

A new campaign dubbed 'GhostPoster' is hiding JavaScript code in the image logo of malicious Firefox extensions counting more than 50,000 downloads, to monitor browser activity and plant a backdoor. [...]

Posted by Bill Toulas on Tue 16 December 2025 in BleepingComputer.

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