CVE-2024-32939 Email addresses of remote users visible in props regardless of server settings

What is CVE-2024-32939?

CVE-2024-32939 is a medium-severity vulnerability in Mattermost Mattermost, published on 22 Aug 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0, 9.8.x <= 9.8.2, when shared channels are enabled, fail to redact remote users' original email addresses stored in user props when email addresses are otherwise configured not to be visible in the local server."

Weakness: CWE-312, CWE-284

Which versions are affected by CVE-2024-32939?

12 open source packages ship an affected version, including github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-server and github.com/mattermost/mattermost-server/v5. It affects 1 product.

Products include Mattermost Mattermost.

How do I fix CVE-2024-32939?

Upgrade github.com/mattermost/mattermost/server/v8 to a fixed version for your release line: 9.10.1, 9.5.8, 9.8.3 or 9.9.2.

Is CVE-2024-32939 being exploited?

There is no known exploitation of CVE-2024-32939 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-4ww8-fprq-cq34, GO-2024-3093.