{"id":"CVE-2020-28871","aliases":["EUVD-2020-21262","GHSA-pcjf-xrw4-4cc2"],"status":"published","title":"Remote code execution in Monitorr v1.7.6m in upload.php allows an unauthorized person to execute...","description":"Remote code execution in Monitorr v1.7.6m in upload.php allows an unauthorized person to execute arbitrary code on the server-side via an insecure file upload.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.85901,"percentile":0.99731,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-434"],"published":"2021-02-10T00:00:00Z","modified":"2026-10-24T10:30:32Z","exploits":[{"source":"metasploit","id":"exploit/multi/http/monitorr_webshell_rce_cve_2020_28871","title":"Monitorr unauthenticated Remote Code Execution (RCE)","type":"exploit","platform":"Linux,PHP,Unix,Windows","date":"2020-11-16","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/multi/http/monitorr_webshell_rce_cve_2020_28871"},{"source":"nuclei","id":"CVE-2020-28871","title":"Monitorr 1.7.6m - Unauthenticated Remote Code Execution","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-28871.yaml"}],"products":[{"vendor":"monitorr","product":"monitorr"}],"references":[{"url":"https://lyhinslab.org/index.php/2020/09/12/how-the-white-box-hacking-works-authorization-bypass-and-remote-code-execution-in-monitorr-1-7-6/","tags":["x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://www.exploit-db.com/exploits/48980","tags":["x_transferred","Exploit","Third Party Advisory","VDB Entry","evidence"]},{"url":"http://packetstormsecurity.com/files/163263/Monitorr-1.7.6m-Bypass-Information-Disclosure-Shell-Upload.html","tags":["x_transferred","Exploit","Third Party Advisory","VDB Entry","evidence"]},{"url":"http://packetstormsecurity.com/files/170974/Monitorr-1.7.6-Shell-Upload.html","tags":["x_transferred","web"]},{"url":"http://packetstormsecurity.com/files/171429/Monitorr-1.7.6m-1.7.7d-Remote-Code-Execution.html","tags":["x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-28871"},{"url":"https://github.com/advisories/GHSA-pcjf-xrw4-4cc2"}],"sources":{"cve":[{"id":"CVE-2020-28871","description":"Remote code execution in Monitorr v1.7.6m in upload.php allows an unauthorized person to execute arbitrary code on the server-side via an insecure file upload.","status":"published","published":"2021-02-10T00:00:00Z","modified":"2024-08-04T16:41:00.159Z","updated_at":"2026-11-02T14:35:57.017407Z"}],"euvd":[{"id":"EUVD-2020-21262","description":"Remote code execution in Monitorr v1.7.6m in upload.php allows an unauthorized person to execute arbitrary code on the server-side via an insecure file upload.","status":"published","published":"2021-02-10T00:00:00Z","modified":"2024-08-04T16:41:00Z","updated_at":"2026-11-03T03:07:09.169254Z"}],"ghsa":[{"id":"GHSA-pcjf-xrw4-4cc2","title":"Remote code execution in Monitorr v1.7.6m in upload.php allows an unauthorized person to execute...","description":"Remote code execution in Monitorr v1.7.6m in upload.php allows an unauthorized person to execute arbitrary code on the server-side via an insecure file upload.","status":"published","published":"2022-05-24T17:41:42Z","modified":"2023-03-31T05:06:58Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:54:25.211321Z"}],"nvd":[{"id":"CVE-2020-28871","description":"Remote code execution in Monitorr v1.7.6m in upload.php allows an unauthorized person to execute arbitrary code on the server-side via an insecure file upload.","status":"published","published":"2021-02-10T01:15:14.627Z","modified":"2026-06-17T03:10:46.29Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:06:34.188486Z"}],"osv":[{"id":"CVE-2020-28871","description":"Remote code execution in Monitorr v1.7.6m in upload.php allows an unauthorized person to execute arbitrary code on the server-side via an insecure file upload.","status":"published","published":"2021-02-10T01:15:14.627Z","modified":"2026-10-24T10:30:32.869495102Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:16.612899Z"}]}}