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GHSA-3q4q-wqm6-hvf3

Mattermost has a Missing Authorization vulnerability

Source: GitHub Advisory Database (reviewed) Moderate CVE-2025-41410

Packages

EcosystemPackageAffectedFixed in
Go github.com/mattermost/mattermost/server/v8 < 8.0.0-20250822083415-01b95392a450 8.0.0-20250822083415-01b95392a450
Go github.com/mattermost/mattermost-server >= 10.10.0, < 10.10.3 10.10.3
Go github.com/mattermost/mattermost-server >= 10.5.0, < 10.5.11 10.5.11
Go github.com/mattermost/mattermost-server >= 10.11.0, < 10.11.3 10.11.3

Details

As written in the advisory (Markdown source, shown as plain text).

Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions.

References

External links from the advisory. They lead to third-party sites.