CVE-2021-4226

RSFirewall tries to identify the original IP address by looking at different HTTP headers. A bypass is possible due to the way it is implemented.

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://wpscan.com/vulnerability/c0ed80c8-ebbf-4ed9-b02f-31660097c352	Exploit Third Party Advisory
https://wpscan.com/vulnerability/c0ed80c8-ebbf-4ed9-b02f-31660097c352	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:rsjoomla:rsfirewall\!:*:*:*:*:*:wordpress:*:*

History

27 May 2025, 21:06

Type	Values Removed	Values Added
CWE		NVD-CWE-noinfo

21 Apr 2025, 15:15

Type	Values Removed	Values Added
CWE		CWE-345

21 Nov 2024, 06:37

Type	Values Removed	Values Added
References	~~() https://wpscan.com/vulnerability/c0ed80c8-ebbf-4ed9-b02f-31660097c352 - Exploit, Third Party Advisory~~	() https://wpscan.com/vulnerability/c0ed80c8-ebbf-4ed9-b02f-31660097c352 - Exploit, Third Party Advisory

20 Dec 2022, 16:19

Type	Values Removed	Values Added
References	~~(MISC) https://wpscan.com/vulnerability/c0ed80c8-ebbf-4ed9-b02f-31660097c352 -~~	(MISC) https://wpscan.com/vulnerability/c0ed80c8-ebbf-4ed9-b02f-31660097c352 - Exploit, Third Party Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8
CPE		cpe:2.3:a:rsjoomla:rsfirewall\!::::::wordpress::*

15 Dec 2022, 19:56

Type	Values Removed	Values Added
New CVE

Information

Published : 2022-12-15 19:15

Updated : 2025-05-27 21:06

NVD link : CVE-2021-4226

Mitre link : CVE-2021-4226

CVE.ORG link : CVE-2021-4226

JSON object : View

Products Affected

rsjoomla

rsfirewall\!

CWE

NVD-CWE-noinfo CWE-345

Insufficient Verification of Data Authenticity

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