{"id":"CVE-2021-42330","aliases":["EUVD-2021-29304","GHSA-xq9f-7hxc-qrqx"],"status":"published","title":"ShinHer Information Co., LTD. ShinHer StudyOnline System - Improper Authorization-1","description":"The “Teacher Edit” function of ShinHer StudyOnline System does not perform authority control. After logging in with user’s privilege, remote attackers can access and edit other users’ credential and personal information by crafting URL parameters.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00981,"percentile":0.62551,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-285"],"published":"2021-10-15T12:10:31Z","modified":"2026-06-17T04:09:39Z","products":[{"vendor":"shinher information co., ltd.","product":"shinher studyonline system"},{"vendor":"xinheinformation","product":"xinhe_teaching_platform_system"}],"references":[{"url":"https://www.twcert.org.tw/tw/cp-132-5200-3d3ca-1.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42330"},{"url":"https://github.com/advisories/GHSA-xq9f-7hxc-qrqx"}],"sources":{"cve":[{"id":"CVE-2021-42330","title":"ShinHer Information Co., LTD. ShinHer StudyOnline System - Improper Authorization-1","description":"The “Teacher Edit” function of ShinHer StudyOnline System does not perform authority control. After logging in with user’s privilege, remote attackers can access and edit other users’ credential and personal information by crafting URL parameters.","status":"published","published":"2021-10-15T12:10:31.314Z","modified":"2024-09-16T16:38:14.758Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T14:32:58.739039Z"}],"euvd":[{"id":"EUVD-2021-29304","description":"The “Teacher Edit” function of ShinHer StudyOnline System does not perform authority control. After logging in with user’s privilege, remote attackers can access and edit other users’ credential and personal information by crafting URL parameters.","status":"published","published":"2021-10-15T12:10:31Z","modified":"2024-09-16T16:38:14Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:55:49.526752Z"}],"ghsa":[{"id":"GHSA-xq9f-7hxc-qrqx","title":"The “Teacher Edit” function of ShinHer StudyOnline System does not perform authority control....","description":"The “Teacher Edit” function of ShinHer StudyOnline System does not perform authority control. After logging in with user’s privilege, remote attackers can access and edit other users’ credential and personal information by crafting URL parameters.","status":"published","published":"2022-05-24T22:33:56Z","modified":"2023-02-01T05:02:16Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T14:49:52.829666Z"}],"nvd":[{"id":"CVE-2021-42330","description":"The “Teacher Edit” function of ShinHer StudyOnline System does not perform authority control. After logging in with user’s privilege, remote attackers can access and edit other users’ credential and personal information by crafting URL parameters.","status":"published","published":"2021-10-15T12:15:07.643Z","modified":"2026-06-17T04:09:39.503Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"version":"2.0","score":5.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T14:06:59.689345Z"}]}}