CVE-2023-6727: Leak Inaccessible Playbook Information via Channel Action IDOR
Mattermost fails to perform correct authorization checks when creating a playbook action, allowing users without access to the playbook to create playbook actions. If the playbook action created is to post a message in a channel based on specific keywords in a post, some playbook information, like the name, can be leaked.
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2023-6727?
CVE-2023-6727 is considered a medium severity vulnerability due to improper authorization checks in Mattermost.
How do I fix CVE-2023-6727?
To fix CVE-2023-6727, upgrade Mattermost Server to version 9.2.2 or later, or to a version before 8.1.6.
Who is affected by CVE-2023-6727?
CVE-2023-6727 affects Mattermost Server versions up to 8.1.5 and versions 9.2.0 to 9.2.1.
What types of actions can be exploited in CVE-2023-6727?
CVE-2023-6727 allows unauthorized users to create playbook actions that can post messages in channels.
Is there a workaround for CVE-2023-6727?
Currently, there is no documented workaround for CVE-2023-6727 other than upgrading to a secure version of Mattermost.