CVE-2023-4107 Incorrect authorization allows a user manager to update a system admin

What is CVE-2023-4107?

CVE-2023-4107 is a medium-severity missing authorization vulnerability in Mattermost Mattermost, published on 11 Aug 2023. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Mattermost fails to properly validate the requesting user permissions when updating a system admin, allowing a user manager to update a system admin's details such as email, first name and last name.

Weakness: CWE-863

Which versions are affected by CVE-2023-4107?

6 open source packages ship an affected version, including github.com/mattermost/mattermost-server/v6. It affects 1 product.

Products include Mattermost Mattermost.

How do I fix CVE-2023-4107?

Upgrade github.com/mattermost/mattermost-server/v6 to a fixed version for your release line: 7.8.8, 7.10.4 or 7.9.6.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2023-4107 being exploited?

There is no known exploitation of CVE-2023-4107 in the wild and no public exploit code.

Other vulnerabilities in Mattermost Mattermost

• CVE-2019-20851 Path traversal in n/a Critical 9.1
• CVE-2024-39274 Malicious remote can add users to arbitrary teams and channels High 8.7
• CVE-2024-39777 Malicious remote can invite itself to an arbitrary local channel High 8.7
• CVE-2024-39830 Timing attack during remote cluster token comparison when shared channels are enabled High 8.1
• CVE-2023-3615 Lack of server certificate validation in websockets connection High 8.1

All Mattermost Mattermost vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-6xjj-v76v-fwpj.