Vulnerability · Published Jan 30, 2026 · Assigned by VulnCheck
CVE-2020-37023Koken CMS 0.22.24 - Arbitrary File Upload
High 8.8
In plain English
A high-severity unrestricted file upload in Koken CMS from Koken. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.7%top 46.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- ExploitDB-48706 exploit
- Koken CMS Official Homepage product
- Softaculous Koken CMS Software Page product
- Researcher PoC technical-description, exploit
- VulnCheck Advisory: Koken CMS 0.22.24 - Arbitrary File Upload third-party-advisory