Vulnerability Report

CVE-2021-47753

RCE

Title: Unauthenticated File Upload to RCE in phpKF CMS

RCE

Proof Of Concept

No public PoC currently indexed for CVE-2021-47753.

CWE Category CWE-434

Published Date Jan 15, 2026

Modified Date Jan 23, 2026

Exploit Status Not Found

Score 9.3 CVSS v4.0

Exploit Probability (EPSS)

0.67%

Vulnerability Summary

CVE-2021-47753: 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.

Impacted Vendors

patronet 1

phpkf 1

Reference Links

https://www.exploit-db.com/exploits/50610 https://www.phpkf.com/ https://www.phpkf.com/indirme.php

CVSS v4.0

Source Entity [email protected]

Severity CRITICAL

9.3

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW VECTOR

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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

CVSS v3.1