{"id":"CVE-2021-20874","aliases":["EUVD-2021-8283","GHSA-4xfx-j5qc-9qj6"],"status":"published","title":"Incorrect permission assignment for critical resource vulnerability in GroupSession Free edition...","description":"Incorrect permission assignment for critical resource vulnerability in GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier allows a remote unauthenticated attacker to access arbitrary files on the server and obtain sensitive information via unspecified vectors.","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":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01339,"percentile":0.71521,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-732"],"published":"2021-12-24T06:30:29Z","modified":"2026-06-17T03:34:35Z","products":[{"vendor":"groupsession","product":"groupsession"},{"vendor":"japan total system co.,ltd.","product":"groupsession free edition, groupsession bycloud, groupsession zion"}],"references":[{"url":"https://groupsession.jp/info/info-news/security20211220","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://jvn.jp/en/jp/JVN79798166/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20874"},{"url":"https://github.com/advisories/GHSA-4xfx-j5qc-9qj6"}],"sources":{"cve":[{"id":"CVE-2021-20874","description":"Incorrect permission assignment for critical resource vulnerability in GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier allows a remote unauthenticated attacker to access arbitrary files on the server and obtain sensitive information via unspecified vectors.","status":"published","published":"2021-12-24T06:30:29Z","modified":"2024-08-03T17:53:23.075Z","updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-8283","description":"Incorrect permission assignment for critical resource vulnerability in GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier allows a remote unauthenticated attacker to access arbitrary files on the server and obtain sensitive information via unspecified vectors.","status":"published","published":"2021-12-24T06:30:29Z","modified":"2024-08-03T17:53:23Z","updated_at":"2026-11-03T03:25:07.874589Z"}],"ghsa":[{"id":"GHSA-4xfx-j5qc-9qj6","title":"Incorrect permission assignment for critical resource vulnerability in GroupSession Free edition...","description":"Incorrect permission assignment for critical resource vulnerability in GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier allows a remote unauthenticated attacker to access arbitrary files on the server and obtain sensitive information via unspecified vectors.","status":"published","published":"2021-12-25T00:00:29Z","modified":"2023-02-03T05:03:24Z","cwes":["CWE-732"],"updated_at":"2026-11-02T14:53:21.228019Z"}],"nvd":[{"id":"CVE-2021-20874","description":"Incorrect permission assignment for critical resource vulnerability in GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier allows a remote unauthenticated attacker to access arbitrary files on the server and obtain sensitive information via unspecified vectors.","status":"published","published":"2021-12-24T07:15:06.7Z","modified":"2026-06-17T03:34:35.457Z","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":"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-732"],"updated_at":"2026-11-02T14:07:02.977492Z"}]}}