Firefox Fixes Password Leak via Windows Cloud Clipboard Feature

Mozilla has fixed an issue in its Firefox browser where usernames and passwords were being recorded in the Windows Cloud Clipboard feature, in what the organization categorized as a severe security risk that could have exposed credentials to non-owners whenever users copied or cut a password. From a report: The issue was fixed in Firefox 94, released last month, but was detailed in more depth this week by Mozilla developers. At its core, the bug is related to Windows Cloud Clipboard, a feature added to Windows 10 in September 2018 (v1809 release), a feature that allows users to sync their local clipboard history to their Microsoft accounts. The feature is disabled by default, but once enabled, it allows users to access the cloud clipboard section by pressing the Windows+V shortcut. This grants users access to clipboard data from all devices, but the feature is also used for its clipboard history capabilities, allowing users to go through past items they copied or cut and re-paste the same data in new contexts, making it extremely useful for most IT workers. In a blog post on Wednesday, Mozilla said that they have now modified the Firefox browser so that usernames and passwords copied from the browser's password section (about:logins) won't be stored in the Windows Cloud Clipboard feature, but instead will be stored only locally, in a separate clipboard section.

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