CVE-2024-34152: Improper Access Control

Mattermost versions 9.5.x = 9.5.3, 9.6.x = 9.6.1 and 8.1.x = 8.1.12 fail to perform proper access control which allows a guest to get the metadata of a public playbook run that linked to the channel they are guest via sending an RHSRuns GraphQL query request to the server...