{"id":"CVE-2026-24664","aliases":["EUVD-2026-5240","GHSA-c3wq-m629-5h2j"],"status":"published","title":"Open eClass is Vulnerable to Username Enumeration via Login Response Discrepancies","description":"The Open eClass platform (formerly known as GUnet eClass) is a complete course management system. Prior to version 4.2, a username enumeration vulnerability allows unauthenticated attackers to identify valid user accounts by analyzing differences in the login response behavior. This issue has been patched in version 4.2.","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":"2026-11-09","score":0.00297,"percentile":0.22519,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-204"],"published":"2026-02-03T16:56:07Z","modified":"2026-10-28T02:30:36Z","products":[{"vendor":"gunet","product":"open_eclass_platform"},{"vendor":"gunet","product":"openeclass"}],"references":[{"url":"https://github.com/gunet/openeclass/security/advisories/GHSA-c3wq-m629-5h2j","tags":["x_refsource_CONFIRM","Exploit","Vendor Advisory","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24664.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24664","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-24664","title":"Open eClass is Vulnerable to Username Enumeration via Login Response Discrepancies","description":"The Open eClass platform (formerly known as GUnet eClass) is a complete course management system. Prior to version 4.2, a username enumeration vulnerability allows unauthenticated attackers to identify valid user accounts by analyzing differences in the login response behavior. This issue has been patched in version 4.2.","status":"published","published":"2026-02-03T16:56:07.167Z","modified":"2026-02-04T16:52:52.603Z","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":"2026-11-02T14:19:50.575061Z"}],"euvd":[{"id":"EUVD-2026-5240","description":"The Open eClass platform (formerly known as GUnet eClass) is a complete course management system. Prior to version 4.2, a username enumeration vulnerability allows unauthenticated attackers to identify valid user accounts by analyzing differences in the login response behavior. This issue has been patched in version 4.2.","status":"published","published":"2026-02-03T16:56:07Z","modified":"2026-02-04T16:52:52Z","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":"2026-11-02T19:48:44.193176Z"}],"nvd":[{"id":"CVE-2026-24664","description":"The Open eClass platform (formerly known as GUnet eClass) is a complete course management system. Prior to version 4.2, a username enumeration vulnerability allows unauthenticated attackers to identify valid user accounts by analyzing differences in the login response behavior. This issue has been patched in version 4.2.","status":"published","published":"2026-02-03T18:16:19.377Z","modified":"2026-06-17T10:23:22.923Z","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":"2026-11-02T14:12:05.149641Z"}],"osv":[{"id":"CVE-2026-24664","title":"Open eClass is Vulnerable to Username Enumeration via Login Response Discrepancies","description":"The Open eClass platform (formerly known as GUnet eClass) is a complete course management system. Prior to version 4.2, a username enumeration vulnerability allows unauthenticated attackers to identify valid user accounts by analyzing differences in the login response behavior. This issue has been patched in version 4.2.","status":"published","published":"2026-02-03T16:56:07.167Z","modified":"2026-10-28T02:30:36.04149255Z","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":"2026-11-02T15:44:59.079784Z"}]}}