{"id":"CVE-2021-34580","aliases":["EUVD-2021-21230","GHSA-v5p4-qxg5-3jh2"],"status":"published","title":"Remote user enumeration in mymbCONNECT24, mbCONNECT24 \u003c= 2.9.0","description":"In mymbCONNECT24, mbCONNECT24 \u003c= 2.9.0 an unauthenticated user can enumerate valid backend users by checking what kind of response the server sends for crafted invalid login attempts.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01039,"percentile":0.64246,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-203","CWE-204"],"published":"2021-10-27T10:25:09Z","modified":"2026-06-17T03:56:10Z","products":[{"vendor":"mb connect line","product":"mbconnect24"},{"vendor":"mb connect line","product":"mymbconnect24"},{"vendor":"mbconnectline","product":"mbconnect24"},{"vendor":"mbconnectline","product":"mymbconnect24"}],"references":[{"url":"https://cert.vde.com/en/advisories/VDE-2021-037/","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34580"},{"url":"https://github.com/advisories/GHSA-v5p4-qxg5-3jh2"}],"sources":{"cve":[{"id":"CVE-2021-34580","title":"Remote user enumeration in mymbCONNECT24, mbCONNECT24 \u003c= 2.9.0","description":"In mymbCONNECT24, mbCONNECT24 \u003c= 2.9.0 an unauthenticated user can enumerate valid backend users by checking what kind of response the server sends for crafted invalid login attempts.","status":"published","published":"2021-10-27T10:25:09.307Z","modified":"2024-09-17T01:41:24.149Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-204"],"updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-21230","description":"In mymbCONNECT24, mbCONNECT24 \u003c= 2.9.0 an unauthenticated user can enumerate valid backend users by checking what kind of response the server sends for crafted invalid login attempts.","status":"published","published":"2021-10-27T10:25:09Z","modified":"2024-09-17T01:41:24Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-03T00:28:47.497259Z"}],"ghsa":[{"id":"GHSA-v5p4-qxg5-3jh2","title":"In mymbCONNECT24, mbCONNECT24 \u003c= 2.9.0 an unauthenticated user can enumerate valid backend users...","description":"In mymbCONNECT24, mbCONNECT24 \u003c= 2.9.0 an unauthenticated user can enumerate valid backend users by checking what kind of response the server sends for crafted invalid login attempts.","status":"published","published":"2022-05-24T19:18:58Z","modified":"2023-01-30T05:03:25Z","cwes":["CWE-203","CWE-204"],"updated_at":"2026-11-02T14:46:50.018589Z"}],"nvd":[{"id":"CVE-2021-34580","description":"In mymbCONNECT24, mbCONNECT24 \u003c= 2.9.0 an unauthenticated user can enumerate valid backend users by checking what kind of response the server sends for crafted invalid login attempts.","status":"published","published":"2021-10-27T11:15:07.553Z","modified":"2026-06-17T03:56:10.077Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-204","CWE-203"],"updated_at":"2026-11-02T14:07:00.549994Z"}]}}