We are releasing a recommended security update via Mattermost 5.9.1, 5.8.2 and 4.10.9 (ESR) Team Edition and Mattermost 5.9.1, 5.8.2 and 4.10.9 (ESR) Enterprise Edition. This security update addresses a high-level vulnerability discovered during a security research review by Leandro Chaves.
Follow the standard upgrade instructions to update to Mattermost 5.9.1 and apply the updates.
Per the Mattermost Responsible Disclosure Policy, details of the update will be posted on our security updates page 30 days after release.
Install Mattermost 5.9.1
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Need help upgrading to the latest version of Mattermost? Head over to our documentation to read our Admin guide for upgrading your Mattermost server to Mattermost 5.9.1, or join our Community server to ask questions of Mattermost community members and product experts.
Upgrade to Mattermost Enterprise
Mattermost Enterprise Edition E10 and E20 are commercial versions of Mattermost designed for today’s leading organizations. For more information on features and pricing, check this out.
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