CVE-2021-4226
9.8 · CRITICALOverview
CVE-2021-4226 is a critical-severity vulnerability affecting rsjoomla rsfirewall\!. It was published on December 15, 2022 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from rsjoomla. Update rsfirewall\! to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| rsjoomla | rsfirewall\! | >= 0, < 1.1.25 | Affected |
Frequently Asked Questions
What is CVE-2021-4226?
CVE-2021-4226 is a critical-severity vulnerability affecting rsjoomla rsfirewall\!. It was published on December 15, 2022 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2021-4226?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-4226?
Check the references section for vendor advisories and patches from rsjoomla. Update rsfirewall\! to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-4226?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-4226 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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