{"id":"CVE-2021-30478","details":"An issue was discovered in Zulip Server before 3.4. A bug in the implementation of the can_forge_sender permission (previously is_api_super_user) resulted in users with this permission being able to send messages appearing as if sent by a system bot, including to other organizations hosted by the same Zulip installation.","modified":"2026-08-07T16:50:18.433478Z","published":"2021-04-15T00:15:13.107Z","references":[{"type":"ADVISORY","url":"https://blog.zulip.com/2021/04/14/zulip-server-3-4/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/zulip/zulip","events":[{"introduced":"0"},{"fixed":"974b95b0956e6be5ef43683fbfac951d6460c802"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"3.4"}]}}],"versions":["3.3","3.2","3.1","4.0-dev","3.0","3.0-rc2","3.0-rc1","3.0-dev","2.2-dev","2.1.0","2.1.0-rc1","shared-0.0.2","shared-0.0.1","2.0.0","2.1-dev","2.0.0-rc1","1.9.0","1.9.0-rc3","1.9.0-rc2","1.8.0","1.8.0-rc1","1.7.0","1.6.0","1.5.0","1.4.0","1.3.13","1.3.11","1.3.10","1.3.9","1.3.8","1.3.7","1.3.6","1.3.5","1.3.4","1.3.3","1.3.2","1.3.1","1.3.0","enterprise-1.2.0","enterprise-1.1.5"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-30478.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"}]}