// For flags

CVE-2021-4226

RSFirewall < 1.1.25 - IP Block Bypass

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

RSFirewall intenta identificar la dirección IP original observando diferentes encabezados HTTP. Es posible una omisión debido a la forma en que se implementa.

The RSFirewall! plugin for WordPress is vulnerable to IP Address Spoofing in versions less than and equal to 1.1.24 due to insufficient IP address validation. This makes it possible for attackers to bypass blocks and access services they should not be able to.

*Credits: Daniel Ruf
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2022-04-10 CVE Reserved
  • 2022-04-13 CVE Published
  • 2024-07-07 EPSS Updated
  • 2024-08-03 CVE Updated
  • 2024-08-03 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-348: Use of Less Trusted Source
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Rsjoomla
Search vendor "Rsjoomla"
 Rsfirewall\!
Search vendor "Rsjoomla" for product "Rsfirewall\!"
 < 1.1.25
Search vendor "Rsjoomla" for product "Rsfirewall\!" and version " < 1.1.25"
wordpress
Affected