{"id":"CVE-2025-46736","aliases":["EUVD-2025-13623","GHSA-4g8m-5mj5-c8xg"],"status":"published","title":"Umbraco Makes User Enumeration Feasible Based on Timing of Login Response","description":"Umbraco is a free and open source .NET content management system. Prior to versions 10.8.10 and 13.8.1, based on an analysis of the timing of post login API responses, it's possible to determine whether an account exists. The issue is patched in versions 10.8.10 and 13.8.1. No known workarounds are available.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00389,"percentile":0.33292,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-204"],"published":"2025-05-06T16:38:55Z","modified":"2026-10-28T02:31:01Z","fixes":[{"ecosystem":"NuGet","package":"Umbraco.Cms","fixed_in":["13.8.1","10.8.10"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"NuGet","package":"Umbraco.Cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"11.0.0-rc1"},{"fixed":"13.8.1"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"Umbraco.Cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.8.10"}]}]},{"source":"osv","ecosystem":"NuGet","package":"Umbraco.Cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"11.0.0-rc1"},{"fixed":"13.8.1"}]}],"versions":["11.0.0","11.0.0-rc1","11.0.0-rc2","11.0.0-rc3","11.0.0-rc4","11.0.0-rc5","11.0.0-rc6","11.1.0","11.1.0-rc","11.2.0","11.2.0-rc","11.2.1","11.2.2","11.3.0","11.3.0-rc","11.3.1","11.4.0","11.4.0-rc","11.4.1","11.4.2","11.5.0","11.5.0-rc","12.0.0","12.0.0-rc1","12.0.0-rc2","12.0.0-rc3","12.0.0-rc4","12.0.0-rc5","12.0.1","12.1.0","12.1.0-rc","12.1.1","12.1.2","12.2.0","12.2.0-rc","12.3.0","12.3.0-rc","12.3.1","12.3.10","12.3.2","12.3.3","12.3.4","12.3.5","12.3.6","12.3.7","12.3.8","12.3.9","13.0.0","13.0.0-rc1","13.0.0-rc2","13.0.0-rc3","13.0.0-rc4","13.0.0-rc5","13.0.1","13.0.2","13.0.3","13.1.0","13.1.0-rc","13.1.1","13.2.0","13.2.0-rc","13.2.1","13.2.2","13.3.0","13.3.0-rc","13.3.1","13.3.2","13.4.0","13.4.0-rc","13.4.0-rc2","13.4.1","13.5.0","13.5.0-rc","13.5.1","13.5.2","13.5.3","13.6.0","13.6.0-rc","13.6.0-rc2","13.7.0","13.7.0-rc","13.7.1","13.7.2","13.8.0","13.8.0-rc"]},{"source":"osv","ecosystem":"NuGet","package":"Umbraco.Cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.8.10"}]}],"versions":["10.0.0","10.0.0-rc1","10.0.0-rc2","10.0.0-rc3","10.0.0-rc4","10.0.0-rc5","10.0.1","10.1.0","10.1.0-rc","10.1.0-rc2","10.1.1","10.2.0","10.2.0-rc","10.2.1","10.3.0","10.3.0-rc","10.3.1","10.3.2","10.4.0","10.4.0-rc","10.4.1","10.4.2","10.5.0","10.5.0-rc","10.5.1","10.6.0","10.6.0-rc","10.6.1","10.7.0","10.7.0-rc","10.8.0","10.8.0-rc","10.8.1","10.8.2","10.8.3","10.8.4","10.8.5","10.8.6","10.8.7","10.8.8","10.8.9","9.0.0","9.0.0-rc001","9.0.0-rc002","9.0.0-rc003","9.0.0-rc004","9.0.1","9.1.0","9.1.0-rc","9.1.1","9.1.2","9.2.0","9.2.0-rc","9.3.0","9.3.0-rc","9.3.1","9.4.0","9.4.0-rc","9.4.1","9.4.2","9.4.3","9.5.0","9.5.0-rc","9.5.0-rc2","9.5.0-rc3","9.5.1","9.5.2","9.5.3","9.5.4"]}],"products":[{"vendor":"umbraco","product":"umbraco-cms"},{"vendor":"umbraco","product":"umbraco_cms"}],"references":[{"url":"https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-4g8m-5mj5-c8xg","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","web"]},{"url":"https://github.com/umbraco/Umbraco-CMS/commit/14fbd20665b453cbf094ccf4575b79a9fba07e03","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/umbraco/Umbraco-CMS/commit/34709be6cce9752dfa767dffbf551305f48839bc","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-46736","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4g8m-5mj5-c8xg"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/46xxx/CVE-2025-46736.json","tags":["advisory"]},{"url":"https://github.com/umbraco/Umbraco-CMS","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-46736","title":"Umbraco Makes User Enumeration Feasible Based on Timing of Login Response","description":"Umbraco is a free and open source .NET content management system. Prior to versions 10.8.10 and 13.8.1, based on an analysis of the timing of post login API responses, it's possible to determine whether an account exists. The issue is patched in versions 10.8.10 and 13.8.1. No known workarounds are available.","status":"published","published":"2025-05-06T17:08:23.503Z","modified":"2025-05-06T19:41:51.341Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-204"],"updated_at":"2026-11-02T14:32:36.706507Z"}],"euvd":[{"id":"EUVD-2025-13623","description":"Umbraco is a free and open source .NET content management system. Prior to versions 10.8.10 and 13.8.1, based on an analysis of the timing of post login API responses, it's possible to determine whether an account exists. The issue is patched in versions 10.8.10 and 13.8.1. No known workarounds are available.","status":"published","published":"2025-05-06T17:08:23Z","modified":"2025-05-06T19:41:51Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T20:32:53.861279Z"}],"ghsa":[{"id":"GHSA-4g8m-5mj5-c8xg","title":"Umbraco Makes User Enumeration Feasible Based on Timing of Login Response","description":"### Impact\nBased on an analysis of the timing of post login API responses, it's possible to determine whether an account exists.\n\n### Patches\nPatched in 10.8.10 and 13.8.1.\n\n### Workarounds\nNone available.","status":"published","published":"2025-05-06T16:38:55Z","modified":"2025-05-06T19:57:09Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-204"],"updated_at":"2026-11-02T14:38:42.263728Z"}],"nvd":[{"id":"CVE-2025-46736","description":"Umbraco is a free and open source .NET content management system. Prior to versions 10.8.10 and 13.8.1, based on an analysis of the timing of post login API responses, it's possible to determine whether an account exists. The issue is patched in versions 10.8.10 and 13.8.1. No known workarounds are available.","status":"published","published":"2025-05-06T17:16:12.717Z","modified":"2026-06-17T09:26:54.21Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-204"],"updated_at":"2026-11-02T14:11:04.33372Z"}],"osv":[{"id":"CVE-2025-46736","title":"Umbraco Makes User Enumeration Feasible Based on Timing of Login Response","description":"Umbraco is a free and open source .NET content management system. Prior to versions 10.8.10 and 13.8.1, based on an analysis of the timing of post login API responses, it's possible to determine whether an account exists. The issue is patched in versions 10.8.10 and 13.8.1. No known workarounds are available.","status":"published","published":"2025-05-06T17:08:23.503Z","modified":"2026-10-28T02:31:01.608188357Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-204"],"updated_at":"2026-11-02T15:44:49.707645Z"},{"id":"GHSA-4g8m-5mj5-c8xg","title":"Umbraco Makes User Enumeration Feasible Based on Timing of Login Response","description":"### Impact\nBased on an analysis of the timing of post login API responses, it's possible to determine whether an account exists.\n\n### Patches\nPatched in 10.8.10 and 13.8.1.\n\n### Workarounds\nNone available.","status":"published","published":"2025-05-06T16:38:55Z","modified":"2025-05-06T20:07:41.49463Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-204"],"updated_at":"2026-11-02T15:46:37.148947Z"}]}}