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.
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.
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