{"id":"CVE-2023-5333","aliases":["BIT-mattermost-2023-5333","EUVD-2023-57650","GHSA-w28r-7qw2-ghqc"],"status":"published","title":"Denial of Service via multiple identical User IDs in /api/v4/users/ids","description":"Mattermost fails to deduplicate input IDs allowing a simple user to cause the application to consume excessive resources and possibly crash by sending a specially crafted request to /api/v4/users/ids with multiple identical IDs.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00595,"percentile":0.4879,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2023-10-09T10:41:36Z","modified":"2026-10-28T02:30:52Z","fixes":[{"ecosystem":"Bitnami","package":"mattermost","fixed_in":["7.8.11","8.0.3","8.1.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"mattermost","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"7.8.11"},{"introduced":"8.0.0"},{"fixed":"8.0.3"},{"introduced":"8.1.0"},{"fixed":"8.1.2"}]}]}],"products":[{"vendor":"mattermost","product":"mattermost"},{"vendor":"mattermost","product":"mattermost_server"}],"references":[{"url":"https://mattermost.com/security-updates","tags":["x_transferred","Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-5333","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-w28r-7qw2-ghqc"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/5xxx/CVE-2023-5333.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-5333","title":" Denial of Service via multiple identical User IDs in /api/v4/users/ids","description":"Mattermost fails to deduplicate input IDs allowing a simple user to cause the application to consume excessive resources and possibly crash by sending a specially crafted request to /api/v4/users/ids with multiple identical IDs. \n\n","status":"published","published":"2023-10-09T10:41:36.597Z","modified":"2024-09-05T19:46:32.169Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:35:17.149492Z"}],"euvd":[{"id":"EUVD-2023-57650","description":"Mattermost fails to deduplicate input IDs allowing a simple user to cause the application to consume excessive resources and possibly crash by sending a specially crafted request to /api/v4/users/ids with multiple identical IDs. \n\n","status":"published","published":"2023-10-09T10:41:36Z","modified":"2024-09-05T19:46:32Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-03T00:56:02.678796Z"}],"ghsa":[{"id":"GHSA-w28r-7qw2-ghqc","title":"Mattermost fails to deduplicate input IDs allowing a simple user to cause the application to...","description":"Mattermost fails to deduplicate input IDs allowing a simple user to cause the application to consume excessive resources and possibly crash by sending a specially crafted request to /api/v4/users/ids with multiple identical IDs. \n\n","status":"published","published":"2023-10-09T12:30:20Z","modified":"2024-04-04T08:26:08Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:56:58.612577Z"}],"nvd":[{"id":"CVE-2023-5333","description":"Mattermost fails to deduplicate input IDs allowing a simple user to cause the application to consume excessive resources and possibly crash by sending a specially crafted request to /api/v4/users/ids with multiple identical IDs. \n\n","status":"published","published":"2023-10-09T11:15:11.363Z","modified":"2026-06-17T06:48:21.883Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","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:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:08:36.656095Z"}],"osv":[{"id":"CVE-2023-5333","title":" Denial of Service via multiple identical User IDs in /api/v4/users/ids","description":"Mattermost fails to deduplicate input IDs allowing a simple user to cause the application to consume excessive resources and possibly crash by sending a specially crafted request to /api/v4/users/ids with multiple identical IDs. \n\n","status":"published","published":"2023-10-09T10:41:36.597Z","modified":"2026-10-28T02:30:52.830232461Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:44:36.109881Z"},{"id":"BIT-mattermost-2023-5333","description":"Mattermost fails to deduplicate input IDs allowing a simple user to cause the application to consume excessive resources and possibly crash by sending a specially crafted request to /api/v4/users/ids with multiple identical IDs.","status":"published","published":"2024-03-06T10:57:14.885Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"}]}}