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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.exploit-db.com/exploits/50610	Exploit Third Party Advisory
https://www.phpkf.com/	Product
https://www.phpkf.com/indirme.php	Product
https://www.exploit-db.com/exploits/50610	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:phpkf:cms:3.00:beta_y6:*:*:*:*:*:*

History

23 Jan 2026, 18:31

Type	Values Removed	Values Added
CPE		cpe:2.3:a:phpkf:cms:3.00:beta_y6::::::
First Time		Phpkf cms Phpkf
References	~~() https://www.exploit-db.com/exploits/50610 -~~	() https://www.exploit-db.com/exploits/50610 - Exploit, Third Party Advisory
References	~~() https://www.phpkf.com/ -~~	() https://www.phpkf.com/ - Product
References	~~() https://www.phpkf.com/indirme.php -~~	() https://www.phpkf.com/indirme.php - Product

15 Jan 2026, 19:16

Type	Values Removed	Values Added
References	~~() https://www.exploit-db.com/exploits/50610 -~~	() https://www.exploit-db.com/exploits/50610 -

15 Jan 2026, 16:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-15 16:16

Updated : 2026-01-23 18:31

NVD link : CVE-2021-47753

Mitre link : CVE-2021-47753

CVE.ORG link : CVE-2021-47753

JSON object : View

Products Affected

phpkf

cms

CWE

CWE-434

Unrestricted Upload of File with Dangerous Type

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