{"id":"CVE-2021-36581","title":"Kooboo CMS 2.1.1.0 is vulnerable to Insecure file upload","summary":"Kooboo CMS 2.1.1.0 is vulnerable to Insecure file upload. It is possible to upload any file extension to the server. The server does not verify the extension of the file and the tester was able to upload an aspx to the server.","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-434"],"vendor":"kooboo","product":"kooboo_cms","affected":["kooboo_cms = 2.1.1.0"],"published":"2021-09-14","updated":"2026-07-05","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-36581","references":[{"url":"https://github.com/l00neyhacker/CVE-2021-36581/","label":"cve@mitre.org"},{"url":"http://kooboo.com","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/l00neyhacker/CVE-2021-36581/","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.0143,"epssPercentile":0.71862,"ingestedAt":"2026-07-06T01:08:17.031Z","slug":"CVE-2021-36581","body":"## Overview\n\nKooboo CMS 2.1.1.0 is vulnerable to Insecure file upload. It is possible to upload any file extension to the server. The server does not verify the extension of the file and the tester was able to upload an aspx to the server.\n\n## Affected\n\n- `kooboo_cms = 2.1.1.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}