{"id":"CVE-2024-39361","aliases":["EUVD-2024-37918","GHSA-76jf-55hx-4969"],"status":"published","title":"Creating posts with user-defined IDs permitted in CreatePost API","description":"Mattermost versions 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5 fail to prevent users from specifying a RemoteId for their posts which allows an attacker to specify both a remoteId and the post ID, resulting in creating a post with a user-defined post ID. This can cause some broken functionality in the channel or thread with user-defined posts","severity":{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00277,"percentile":0.20292,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-284"],"published":"2024-07-03T08:35:43Z","modified":"2026-10-28T02:30:36Z","products":[{"vendor":"mattermost","product":"mattermost"}],"references":[{"url":"https://mattermost.com/security-updates","tags":["x_transferred","Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-39361","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-76jf-55hx-4969"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39361.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2024-39361","title":"Creating posts with user-defined IDs permitted in CreatePost API","description":"Mattermost versions 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5 fail to prevent users from specifying a RemoteId for their posts which allows an attacker to specify both a remoteId and the post ID, resulting in creating a post with a user-defined post ID. This can cause some broken functionality in the channel or thread with user-defined posts","status":"published","published":"2024-07-03T08:35:43.118Z","modified":"2024-08-02T04:26:14.801Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:34:18.951288Z"}],"euvd":[{"id":"EUVD-2024-37918","description":"Mattermost versions 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5 fail to prevent users from specifying a RemoteId for their posts which allows an attacker to specify both a remoteId and the post ID, resulting in creating a post with a user-defined post ID. This can cause some broken functionality in the channel or thread with user-defined posts","status":"published","published":"2024-07-03T08:35:43Z","modified":"2024-08-02T04:26:14Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-03T03:50:18.019857Z"}],"ghsa":[{"id":"GHSA-76jf-55hx-4969","title":"Mattermost versions 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5 fail to prevent...","description":"Mattermost versions 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5 fail to prevent users from specifying a RemoteId for their posts which allows an attacker to specify both a remoteId and the post ID, resulting in creating a post with a user-defined post ID. This can cause some broken functionality in the channel or thread with user-defined posts","status":"published","published":"2024-07-03T18:48:09Z","modified":"2024-07-03T18:48:09Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:57:38.140316Z"}],"nvd":[{"id":"CVE-2024-39361","description":"Mattermost versions 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5 fail to prevent users from specifying a RemoteId for their posts which allows an attacker to specify both a remoteId and the post ID, resulting in creating a post with a user-defined post ID. This can cause some broken functionality in the channel or thread with user-defined posts","status":"published","published":"2024-07-03T09:15:06.917Z","modified":"2026-06-17T07:41:47.68Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","level":"medium","assessor":"primary"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:10:10.545705Z"}],"osv":[{"id":"CVE-2024-39361","title":"Creating posts with user-defined IDs permitted in CreatePost API","description":"Mattermost versions 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5 fail to prevent users from specifying a RemoteId for their posts which allows an attacker to specify both a remoteId and the post ID, resulting in creating a post with a user-defined post ID. This can cause some broken functionality in the channel or thread with user-defined posts","status":"published","published":"2024-07-03T08:35:43.118Z","modified":"2026-10-28T02:30:36.742395474Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:44:41.618074Z"}]}}