Vulnerability · Published Jan 15, 2026 · Assigned by VulnCheck
CVE-2021-47753phpKF CMS 3.00 Beta y6 - Remote Code Execution (RCE) (Unauthenticated)
Critical 9.8
In plain English
A critical-severity unrestricted file upload in phpKF CMS from Phpkf. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.8%top 43.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
phpKF CMS 3.00 Beta y6 contains an unauthenticated file upload vulnerability that allows remote attackers to execute arbitrary code by bypassing file extension checks. Attackers can upload a PHP file disguised as a PNG, rename it, and execute system commands through a crafted web shell parameter.
Affected products (as reported)
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- ExploitDB-50610 exploit
- Official Vendor Homepage product
- Software Download Page product