Microsoft OneDrive Mistake—Check Now If All Your Files Have Been Shared

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Microsoft OneDrive Mistake—Check Now If All Your Files Have Been Shared
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Millions are accidentally sharing everything — check settings now.

A new security report warns that millions of users have likely provided “ChatGPT and other web apps full read access to entire OneDrive" without realizing. Given how easy a mistake this is to make, users are urged to check their settings immediately.estimates “that hundreds of apps are affected, including ChatGPT, Slack, Trello, and ClickUp — meaning millions of users may have already granted these apps access to their OneDrive.

Oasis Security says they have advised Microsoft and others of the issue, but there have been no changes and so the onus is on users to check their settings. “While users are prompted to provide consent before completing an upload, the prompt’s vague and unclear language does not communicate the level of access being granted."

Most of the likely file sharing is accidental, but this flaw also “makes it impossible for users to distinguish between malicious apps that target all files and legitimate apps that ask for excessive permissions simply because there is no other secure option.” And now the flaw has been publicly highlighted, it’s an invitation for abuse.

Review the list of apps, and for each app, click on ‘Details’ to view the specific scopes and permissions granted.""In the Entra Admin Center, navigate to the list of enterprise applications.To check the permissions granted to each app, click on an application, then click on the 'Permissions’ button in the left pane. This will list all granted scopes and you can verify whether they are delegated.

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