CVE-2021-20031
A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to...
A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to redirect firewall management users to arbitrary web domains.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to redirect firewall management users to arbitrary web domains.
- Record
CVE-2021-20031- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 5.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:N - Weakness
- CWE-601
- Updated
- 2026-11-02
CVE List No score
A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to redirect firewall management users to arbitrary web domains.
- Record
CVE-2021-20031- Weakness
- CWE-601
- Updated
- 2026-11-02
EUVDEUVD-2021-7494 No score
A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to redirect firewall management users to arbitrary web domains.
- Record
EUVD-2021-7494- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-467c-cx8x-xprw No score
A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to...
A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to redirect firewall management users to arbitrary web domains.
- Record
GHSA-467c-cx8x-xprw- Weakness
- CWE-601
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Sonicwall SonicOS 7.0 - Host Header Injection | 2021-10-13 |
| Nuclei | SonicWall SonicOS 7.0 - Open Redirect |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, Nuclei, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-20031 is a medium vulnerability (CVSS 6.1) in Sonicwall Sonicos, published October 12, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 13.0%, the 96th percentile. No source names a fixed version.