{"id":"CVE-2018-21252","details":"An issue was discovered in Mattermost Server before 5.2, 5.1.1, 5.0.3, and 4.10.3. Attackers could use multiple e-mail addresses to bypass a domain-based policy for signups.","modified":"2026-02-22T08:17:40.662949Z","published":"2020-06-19T18:15:10.677Z","references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost-server","events":[{"introduced":"0"},{"fixed":"821de23caac6a78a3d09da95ad2f833ba2c2372f"},{"introduced":"54994502241bf40bebd9a9d7719c58f708aef5b1"},{"fixed":"77274a7aca64491a1898d4e4239158817a503a8e"},{"introduced":"85a75526c7c03fca1d14a39cfb3f2638d98d3fe1"},{"fixed":"d1534154d18ce1f101738034bee93c77bedda5f4"}]}],"versions":["v5.0.0","v5.0.0-rc6","v5.0.0-rc7","v5.0.1","v5.0.1-rc1","v5.0.2","v5.0.2-rc1","v5.1.0","v5.1.0-rc4"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-21252.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"}]}