{"id":"CVE-2025-47930","aliases":["EUVD-2025-28135","GHSA-rqg7-xfqg-v7q5"],"status":"published","title":"Zulip Server has access control bypass for restrictions on creation of specific channel types","description":"Zulip is an open-source team chat application. Starting in version 10.0 and prior to version 10.3, the \"Who can create public channels\" access control mechanism can be circumvented by creating a private or web-public channel, and then changing the channel privacy to public. A similar technique works for creating private channels without permission, though such a process requires either the API or modifying the HTML, as we do mark the \"private\" radio button as disabled in such cases. Version 10.3 contains a patch.","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00354,"percentile":0.29541,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-863"],"published":"2025-05-15T23:17:29Z","modified":"2026-10-28T02:31:00Z","products":[{"vendor":"zulip","product":"zulip"}],"references":[{"url":"https://github.com/zulip/zulip/security/advisories/GHSA-rqg7-xfqg-v7q5","tags":["x_refsource_CONFIRM","Third Party Advisory","advisory"]},{"url":"https://github.com/zulip/zulip/commit/d2ff4bda4c3efa30fc3ab1f151255cfdbf370f78","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://zulip.com/help/configure-who-can-create-channels","tags":["x_refsource_MISC","Product","web"]},{"url":"https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-10-3","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/47xxx/CVE-2025-47930.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-47930","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2025-47930","title":"Zulip Server has access control bypass for restrictions on creation of specific channel types","description":"Zulip is an open-source team chat application. Starting in version 10.0 and prior to version 10.3, the \"Who can create public channels\" access control mechanism can be circumvented by creating a private or web-public channel, and then changing the channel privacy to public. A similar technique works for creating private channels without permission, though such a process requires either the API or modifying the HTML, as we do mark the \"private\" radio button as disabled in such cases. Version 10.3 contains a patch.","status":"published","published":"2025-05-15T23:17:29.829Z","modified":"2025-05-16T13:19:46.691Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:32:26.320248Z"}],"euvd":[{"id":"EUVD-2025-28135","description":"Zulip is an open-source team chat application. Starting in version 10.0 and prior to version 10.3, the \"Who can create public channels\" access control mechanism can be circumvented by creating a private or web-public channel, and then changing the channel privacy to public. A similar technique works for creating private channels without permission, though such a process requires either the API or modifying the HTML, as we do mark the \"private\" radio button as disabled in such cases. Version 10.3 contains a patch.","status":"published","published":"2025-05-15T23:17:29Z","modified":"2025-05-16T13:19:46Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T20:32:45.606938Z"}],"nvd":[{"id":"CVE-2025-47930","description":"Zulip is an open-source team chat application. Starting in version 10.0 and prior to version 10.3, the \"Who can create public channels\" access control mechanism can be circumvented by creating a private or web-public channel, and then changing the channel privacy to public. A similar technique works for creating private channels without permission, though such a process requires either the API or modifying the HTML, as we do mark the \"private\" radio button as disabled in such cases. Version 10.3 contains a patch.","status":"published","published":"2025-05-16T00:15:18.84Z","modified":"2026-06-17T09:28:51.13Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:11:08.321805Z"}],"osv":[{"id":"CVE-2025-47930","title":"Zulip Server has access control bypass for restrictions on creation of specific channel types","description":"Zulip is an open-source team chat application. Starting in version 10.0 and prior to version 10.3, the \"Who can create public channels\" access control mechanism can be circumvented by creating a private or web-public channel, and then changing the channel privacy to public. A similar technique works for creating private channels without permission, though such a process requires either the API or modifying the HTML, as we do mark the \"private\" radio button as disabled in such cases. Version 10.3 contains a patch.","status":"published","published":"2025-05-15T23:17:29.829Z","modified":"2026-10-28T02:31:00.421801639Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:44:50.037003Z"}]}}