Security Update: Mattermost 5.18.1 / 5.17.3 / 5.16.5 / 5.9.8 (ESR) released

We have released a recommended security update via Mattermost 5.18.1, 5.17.3, 5.16.5, 5.9.8 (ESR) for Team and Enterprise Editions.

This security update addresses a high level vulnerability discovered during a security research review by Juho Nurminen.

Follow the standard upgrade instructions to 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.

This update also resolves the following bug, which was also backported to 5.15.5:

• Fixed an issue where migrating accounts from email to SAML failed.

Install Mattermost 5.18.1

New to Mattermost? Download the latest version of the platform and try it for free.

Need help upgrading to the latest version of Mattermost? Head over here to read our documentation on upgrading to Mattermost 5.18.1

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.

Need some help configuring everything? Whatever your needs, our support team has the expertise to help you get the most out of Mattermost. Grab a subscription today and enjoy custom upgrade and installation support from Mattermost.

Stay up-to-date with Mattermost releases

Want to be the first to learn when new Mattermost releases are available? Subscribe to our newsletter for the latest Mattermost news including feature releases, security updates, upcoming community events and new articles from the team.