CVE-2021-4226
RSFirewall < 1.1.25 - IP Block Bypass
- State
- Published
- Severity
- 9.8 Critical
- Published
- Dec 15, 2022
- Updated
- Apr 21, 2025
- Reserved
- Apr 10, 2022
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-345 Insufficient Verification of Data Authenticity
Affected Products
| Product | Versions |
|---|---|
RSFirewall!Unknown |
|
References
- https://wpscan.com/vulnerability/c0ed80c8-ebbf-4ed9-b02f-31660097c352exploitvdb-entrytechnical-description
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.