{"id":"UBUNTU-CVE-2021-40347","details":"An issue was discovered in views/list.py in GNU Mailman Postorius before 1.3.5. An attacker (logged into any account) can send a crafted POST request to unsubscribe any user from a mailing list, also revealing whether that address was subscribed in the first place.","modified":"2026-02-04T03:50:34.841703Z","published":"2021-09-10T19:15:00Z","related":["USN-5157-1"],"upstream":["CVE-2021-40347"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-40347"},{"type":"REPORT","url":"https://gitlab.com/mailman/postorius/-/commit/3d880c56b58bc26b32eac0799407d74b64b7474b"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5157-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-40347"}],"affected":[{"package":{"name":"postorius","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/postorius@1.1.2-3ubuntu0.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.2-3ubuntu0.1"}]}],"versions":["1.1.0-1","1.1.1-1","1.1.2-1","1.1.2-2","1.1.2-3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"python-django-postorius","binary_version":"1.1.2-3ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40347.json"}},{"package":{"name":"postorius","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/postorius@1.2.4-1ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.4-1ubuntu0.1"}]}],"versions":["1.2.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-django-postorius","binary_version":"1.2.4-1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40347.json"}},{"package":{"name":"postorius","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/postorius@1.3.5-1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.5-1"}]}],"versions":["1.3.4-2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"python3-django-postorius","binary_version":"1.3.5-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40347.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:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}