CVE-2023-1777: Information disclosure in linked message previews
First published: Fri Mar 31 2023(Updated: )
Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.
Credit: responsibledisclosure@mattermost.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mattermost Mattermost Server | <7.1.6 | |
| Mattermost Mattermost Server | =7.7.1 | |
| Mattermost Mattermost Server | =7.8.0 |
Remedy
Update Mattermost to version v7.8.0, v7.1.6, v7.7.2, or higher.
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Reference Links
Frequently Asked Questions
What is the vulnerability ID of this Mattermost vulnerability?
The vulnerability ID is CVE-2023-1777.
What is the severity of CVE-2023-1777?
The severity of CVE-2023-1777 is medium, with a severity value of 5.3.
How does CVE-2023-1777 affect Mattermost?
CVE-2023-1777 affects Mattermost by allowing an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.
Which versions of Mattermost are affected by CVE-2023-1777?
Versions up to and excluding 7.1.6, version 7.7.1, and version 7.8.0 of Mattermost are affected by CVE-2023-1777.
How can I fix CVE-2023-1777?
To fix CVE-2023-1777, it is recommended to update Mattermost to a version that is not affected by the vulnerability.
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- version/mattermost mattermost server/7.8.0