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.
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