However, during this operation Facebook forgot to add permission checks to the delete operation.

Proof Of Concept

1.Create a comment on a post via API.

2.Edit the comment and attach a VIDEO of your choice via API.

Facebook vulnerability allows hackers to delete any video from FB

(As it takes 20 secs to DELETE the video from Facebooks server.)

DELETE /< comment id>

This will delete the video.

Pranav was awarded a five digit bug bounty reward by Facebook for his research.

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source: www.techworm.net