{"id":"CVE-2023-28657","aliases":["EUVD-2023-32318","GHSA-mvj7-x43c-gpcj"],"status":"published","title":"Improper access control vulnerability exists in CONPROSYS HMI System (CHS) versions prior to 3.5...","description":"Improper access control vulnerability exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. A user of the PC where the affected product is installed may gain an administrative privilege. As a result, information regarding the product may be obtained and/or altered by the user.","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":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00708,"percentile":0.53738,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-862"],"published":"2023-06-01T00:00:00Z","modified":"2026-06-17T05:48:29Z","products":[{"vendor":"contec","product":"conprosys_hmi_system"},{"vendor":"contec co., ltd.","product":"conprosys hmi system (chs)"},{"vendor":"contec co.,ltd.","product":"conprosys hmi system (chs)"}],"references":[{"url":"https://www.contec.com/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_chs_230531_en.pdf","tags":["x_transferred","Vendor Advisory"]},{"url":"https://www.contec.com/jp/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_chs_230531_jp.pdf","tags":["x_transferred","Vendor Advisory"]},{"url":"https://jvn.jp/en/vu/JVNVU93372935/","tags":["x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28657"},{"url":"https://jvn.jp/en/vu/JVNVU93372935"},{"url":"https://github.com/advisories/GHSA-mvj7-x43c-gpcj"}],"sources":{"cve":[{"id":"CVE-2023-28657","description":"Improper access control vulnerability exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. A user of the PC where the affected product is installed may gain an administrative privilege. As a result, information regarding the product may be obtained and/or altered by the user.","status":"published","published":"2023-06-01T00:00:00Z","modified":"2025-01-09T19:32:38.643Z","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":"adp"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:35:32.752775Z"}],"euvd":[{"id":"EUVD-2023-32318","description":"Improper access control vulnerability exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. A user of the PC where the affected product is installed may gain an administrative privilege. As a result, information regarding the product may be obtained and/or altered by the user.","status":"published","published":"2023-06-01T00:00:00Z","modified":"2025-01-09T19:32:38Z","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":"2026-11-03T00:04:22.603579Z"}],"ghsa":[{"id":"GHSA-mvj7-x43c-gpcj","title":"Improper access control vulnerability exists in CONPROSYS HMI System (CHS) versions prior to 3.5...","description":"Improper access control vulnerability exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. A user of the PC where the affected product is installed may gain an administrative privilege. As a result, information regarding the product may be obtained and/or altered by the user.","status":"published","published":"2023-06-01T03:30:23Z","modified":"2025-01-09T21:31:25Z","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-862"],"updated_at":"2026-11-02T14:59:27.400832Z"}],"nvd":[{"id":"CVE-2023-28657","description":"Improper access control vulnerability exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. A user of the PC where the affected product is installed may gain an administrative privilege. As a result, information regarding the product may be obtained and/or altered by the user.","status":"published","published":"2023-06-01T02:15:09.597Z","modified":"2026-06-17T05:48:29.233Z","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":"primary"},{"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"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:08:03.795015Z"}]}}