{"id":"CVE-2023-32678","aliases":["EUVD-2023-36919","GHSA-q3wg-jm9p-35fj"],"status":"published","title":"Zulip vulnerable to insufficient authorization check for edition/deletion of messages and topics in private streams by former subscribers","description":"Zulip is an open-source team collaboration tool with topic-based threading that combines email and chat. Users who used to be subscribed to a private stream and have been removed from it since retain the ability to edit messages/topics, move messages to other streams, and delete messages that they used to have access to, if other relevant organization permissions allow these actions. For example, a user may be able to edit or delete their old messages they posted in such a private stream. An administrator will be able to delete old messages (that they had access to) from the private stream. This issue was fixed in Zulip Server version 7.3.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0048,"percentile":0.41767,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-285"],"published":"2023-08-25T20:04:49Z","modified":"2026-10-28T02:31:11Z","products":[{"vendor":"zulip","product":"zulip"},{"vendor":"zulip","product":"zulip_server"}],"references":[{"url":"https://github.com/zulip/zulip/security/advisories/GHSA-q3wg-jm9p-35fj","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-7-3","tags":["x_refsource_MISC","x_transferred","Release Notes","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/32xxx/CVE-2023-32678.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-32678","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-32678","title":"Zulip vulnerable to insufficient authorization check for edition/deletion of messages and topics in private streams by former subscribers","description":"Zulip is an open-source team collaboration tool with topic-based threading that combines email and chat. Users who used to be subscribed to a private stream and have been removed from it since retain the ability to edit messages/topics, move messages to other streams, and delete messages that they used to have access to, if other relevant organization permissions allow these actions. For example, a user may be able to edit or delete their old messages they posted in such a private stream. An administrator will be able to delete old messages (that they had access to) from the private stream. This issue was fixed in Zulip Server version 7.3.","status":"published","published":"2023-08-25T20:04:49.432Z","modified":"2024-09-30T18:17:38.788Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T14:35:29.381004Z"}],"euvd":[{"id":"EUVD-2023-36919","description":"Zulip is an open-source team collaboration tool with topic-based threading that combines email and chat. Users who used to be subscribed to a private stream and have been removed from it since retain the ability to edit messages/topics, move messages to other streams, and delete messages that they used to have access to, if other relevant organization permissions allow these actions. For example, a user may be able to edit or delete their old messages they posted in such a private stream. An administrator will be able to delete old messages (that they had access to) from the private stream. This issue was fixed in Zulip Server version 7.3.","status":"published","published":"2023-08-25T20:04:49Z","modified":"2024-09-30T18:17:38Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-03T00:28:01.909154Z"}],"nvd":[{"id":"CVE-2023-32678","description":"Zulip is an open-source team collaboration tool with topic-based threading that combines email and chat. Users who used to be subscribed to a private stream and have been removed from it since retain the ability to edit messages/topics, move messages to other streams, and delete messages that they used to have access to, if other relevant organization permissions allow these actions. For example, a user may be able to edit or delete their old messages they posted in such a private stream. An administrator will be able to delete old messages (that they had access to) from the private stream. This issue was fixed in Zulip Server version 7.3.","status":"published","published":"2023-08-25T21:15:08.06Z","modified":"2026-06-17T05:59:22.293Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T14:08:25.025396Z"}],"osv":[{"id":"CVE-2023-32678","title":"Zulip vulnerable to insufficient authorization check for edition/deletion of messages and topics in private streams by former subscribers","description":"Zulip is an open-source team collaboration tool with topic-based threading that combines email and chat. Users who used to be subscribed to a private stream and have been removed from it since retain the ability to edit messages/topics, move messages to other streams, and delete messages that they used to have access to, if other relevant organization permissions allow these actions. For example, a user may be able to edit or delete their old messages they posted in such a private stream. An administrator will be able to delete old messages (that they had access to) from the private stream. This issue was fixed in Zulip Server version 7.3.","status":"published","published":"2023-08-25T20:04:49.432Z","modified":"2026-10-28T02:31:11.109346958Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T15:44:32.116263Z"}]}}