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GHSA-wvgv-4fc3-2rcp

Mattermost doesn't prevent disclosure of created user password

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-6345

Packages

EcosystemPackageAffectedFixed in
Go github.com/mattermost/mattermost/server/v8 >= 11.5.0, < 11.5.2 11.5.2
Go github.com/mattermost/mattermost/server/v8 >= 10.11.0, < 10.11.14 10.11.14
Go github.com/mattermost/mattermost/server/v8 >= 11.4.0, < 11.4.4 11.4.4
Go github.com/mattermost/mattermost/server/v8 < 8.0.0-20260311102650-3057ae7e83e9 8.0.0-20260311102650-3057ae7e83e9
Go github.com/mattermost/mattermost-server < 5.3.2-0.20260311102650-3057ae7e83e9 5.3.2-0.20260311102650-3057ae7e83e9

Details

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

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 doesn't prevent disclosure of created user password which allows a malicious attacker to impersonate a user via the use of some of those passwords.. Mattermost Advisory ID: MMSA-2026-00614

References

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