{"id":"CVE-2020-37023","aliases":["EUVD-2020-30953","GHSA-jfgg-fv6q-274f"],"status":"published","title":"Koken CMS 0.22.24 - Arbitrary File Upload","description":"Koken CMS 0.22.24 contains a file upload vulnerability that allows authenticated attackers to bypass file extension restrictions by renaming malicious PHP files. Attackers can upload PHP files with system command execution capabilities by manipulating the file upload request through a web proxy and changing the file extension.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00714,"percentile":0.53993,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-434"],"published":"2026-01-30T22:07:08Z","modified":"2026-06-17T03:16:46Z","products":[{"vendor":"koken","product":"koken cms"}],"references":[{"url":"https://www.exploit-db.com/exploits/48706","tags":["exploit"]},{"url":"http://koken.me/","tags":["product"]},{"url":"https://www.softaculous.com/apps/cms/Koken","tags":["product"]},{"url":"https://github.com/V1n1v131r4/Bypass-File-Upload-on-Koken-CMS/blob/master/README.md","tags":["technical-description","exploit"]},{"url":"https://www.vulncheck.com/advisories/koken-cms-arbitrary-file-upload","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-37023"},{"url":"http://koken.me"},{"url":"https://github.com/advisories/GHSA-jfgg-fv6q-274f"}],"sources":{"cve":[{"id":"CVE-2020-37023","title":"Koken CMS 0.22.24 - Arbitrary File Upload","description":"Koken CMS 0.22.24 contains a file upload vulnerability that allows authenticated attackers to bypass file extension restrictions by renaming malicious PHP files. Attackers can upload PHP files with system command execution capabilities by manipulating the file upload request through a web proxy and changing the file extension.","status":"published","published":"2026-01-30T22:07:08.591Z","modified":"2026-02-03T20:35:43.39Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"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-434"],"updated_at":"2026-11-02T14:35:47.22408Z"}],"euvd":[{"id":"EUVD-2020-30953","description":"Koken CMS 0.22.24 contains a file upload vulnerability that allows authenticated attackers to bypass file extension restrictions by renaming malicious PHP files. Attackers can upload PHP files with system command execution capabilities by manipulating the file upload request through a web proxy and changing the file extension.","status":"published","published":"2026-01-30T22:07:08Z","modified":"2026-02-03T20:35:43Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T19:48:44.612436Z"}],"ghsa":[{"id":"GHSA-jfgg-fv6q-274f","title":"Koken CMS 0.22.24 contains a file upload vulnerability that allows authenticated attackers to...","description":"Koken CMS 0.22.24 contains a file upload vulnerability that allows authenticated attackers to bypass file extension restrictions by renaming malicious PHP files. Attackers can upload PHP files with system command execution capabilities by manipulating the file upload request through a web proxy and changing the file extension.","status":"published","published":"2026-01-31T00:30:28Z","modified":"2026-01-31T00:30:35Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"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-434"],"updated_at":"2026-11-02T15:05:59.660813Z"}],"nvd":[{"id":"CVE-2020-37023","description":"Koken CMS 0.22.24 contains a file upload vulnerability that allows authenticated attackers to bypass file extension restrictions by renaming malicious PHP files. Attackers can upload PHP files with system command execution capabilities by manipulating the file upload request through a web proxy and changing the file extension.","status":"published","published":"2026-01-30T23:16:06.96Z","modified":"2026-06-17T03:16:46.887Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"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-434"],"updated_at":"2026-11-02T14:06:48.591569Z"}]}}