CVE-2021-47753

CRITICAL

phpKF CMS 3.00 Beta y6 - Unauthenticated Arbitrary File Upload via File Extension Bypass

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47753. PoCs published by Halit AKAYDIN.

AI-analyzed exploit summary This exploit demonstrates an unauthenticated remote code execution (RCE) vulnerability in phpKF CMS 3.00 Beta y6 by exploiting a file upload mechanism that only checks file extensions. It uploads a malicious PHP file disguised as a PNG, renames it to execute arbitrary commands, and provides an interactive shell.

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.

Exploits (1)

exploitdb WORKING POC
by Halit AKAYDIN · pythonwebappsphp
https://www.exploit-db.com/exploits/50610

This exploit demonstrates an unauthenticated remote code execution (RCE) vulnerability in phpKF CMS 3.00 Beta y6 by exploiting a file upload mechanism that only checks file extensions. It uploads a malicious PHP file disguised as a PNG, renames it to execute arbitrary commands, and provides an interactive shell.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: phpKF CMS 3.00 Beta y6
No auth needed
Prerequisites: Target must be running phpKF CMS 3.00 Beta y6 · Network access to the target web application
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/50610
Product product
https://www.phpkf.com/

Scores

CVSS v3 9.8
EPSS 0.0067
EPSS Percentile 47.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-434
Status published
Products (2)
phpkf/cms 3.00 beta_y6
Phpkf/phpKF CMS 3.00
Published Jan 15, 2026
Tracked Since Feb 18, 2026