Vulnerability CVE-2023-28357


Published: 2023-05-11   Modified: 2023-05-12

Description:
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.

 References:
https://hackerone.com/reports/1445810

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