Playbook information disclosure via unchecked action creation
Published Dec 12, 2023 · Updated May 24, 2025
Improper authorization in Mattermost 8.1.5 and earlier and 9.2.1 and earlier allows remote authenticated users to read playbook names. The playbook-action creation path accepts an inaccessible playbook identifier without verifying the caller’s access, then exposes the playbook name when a keyword-triggered channel message action runs. A valid low-privilege account, knowledge of the target playbook identifier, and a matching channel post are required; the reported consequence is limited to disclosure of playbook information.
Summary
What happened
Improper authorization in Mattermost 8.1.5 and earlier and 9.2.1 and earlier allows remote authenticated users to read playbook names. The playbook-action creation path accepts an inaccessible playbook identifier without verifying the caller’s access, then exposes the playbook name when a keyword-triggered channel message action runs. A valid low-privilege account, knowledge of the target playbook identifier, and a matching channel post are required; the reported consequence is limited to disclosure of playbook information.
The record
- CVE
- CVE-2023-6727
- Published
- Dec 12, 2023
- Updated
- May 24, 2025
- Vendor
- Mattermost
- Product
- Mattermost
- Classifications
- CWE-200
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 12, 2023CVE publishedPublication date reported by the CVE source.
- May 24, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=8.1.5
- Affected versionversion=0 <=9.2.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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