CVE-2023-28357: Infoleak

First published: Thu May 11 2023(Updated: )

A vulnerability has been identified in Rocket.Chat, where the ACL checks in the Slash Command /mute occur after checking whether a user is a member of a given channel, leaking private channel members to unauthorized users. This allows authenticated users to enumerate whether a username is a member of a channel that they do not have access to.

Credit: support@hackerone.com support@hackerone.com

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