{"id":"CVE-2021-42331","aliases":["EUVD-2021-29305","GHSA-wxc7-jc57-c2hc"],"status":"published","title":"ShinHer Information Co., LTD. ShinHer StudyOnline System - Improper Authorization-2","description":"The “Study Edit” function of ShinHer StudyOnline System does not perform permission control. After logging in with user’s privilege, remote attackers can access and edit other users’ tutorial schedule by crafting URL parameters.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00641,"percentile":0.51191,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-285","CWE-862"],"published":"2021-10-15T12:10:32Z","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-132-5201-dc534-1.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42331"},{"url":"https://github.com/advisories/GHSA-wxc7-jc57-c2hc"}],"sources":{"cve":[{"id":"CVE-2021-42331","title":"ShinHer Information Co., LTD. ShinHer StudyOnline System - Improper Authorization-2","description":"The “Study Edit” function of ShinHer StudyOnline System does not perform permission control. After logging in with user’s privilege, remote attackers can access and edit other users’ tutorial schedule by crafting URL parameters.","status":"published","published":"2021-10-15T12:10:32.855Z","modified":"2024-09-17T01:56:36.675Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T14:32:58.359368Z"}],"euvd":[{"id":"EUVD-2021-29305","description":"The “Study Edit” function of ShinHer StudyOnline System does not perform permission control. After logging in with user’s privilege, remote attackers can access and edit other users’ tutorial schedule by crafting URL parameters.","status":"published","published":"2021-10-15T12:10:32Z","modified":"2024-09-17T01:56:36Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:28:45.29969Z"}],"ghsa":[{"id":"GHSA-wxc7-jc57-c2hc","title":"The “Study Edit” function of ShinHer StudyOnline System does not perform permission control....","description":"The “Study Edit” function of ShinHer StudyOnline System does not perform permission control. After logging in with user’s privilege, remote attackers can access and edit other users’ tutorial schedule by crafting URL parameters.","status":"published","published":"2022-05-24T22:29:04Z","modified":"2023-02-01T05:02:17Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-285","CWE-862"],"updated_at":"2026-11-02T14:49:52.829666Z"}],"nvd":[{"id":"CVE-2021-42331","description":"The “Study Edit” function of ShinHer StudyOnline System does not perform permission control. After logging in with user’s privilege, remote attackers can access and edit other users’ tutorial schedule by crafting URL parameters.","status":"published","published":"2021-10-15T12:15:07.707Z","modified":"2026-06-17T04:09:39.607Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","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","CWE-862"],"updated_at":"2026-11-02T14:06:59.689345Z"}]}}