CVE-2021-20031

MEDIUM NUCLEI

SonicOS < 7.0.1-r1262 - Host Header Redirection

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-20031. PoCs published by Ramikan. A Nuclei detection template is also available.

AI-analyzed exploit summary This exploit demonstrates a Host Header Injection vulnerability in SonicWall SonicOS 7.0, allowing an attacker to spoof the Host header and redirect users to a malicious domain. The PoC shows how modifying the Host header in an HTTP request results in the injected domain appearing in the response.

Description

A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to redirect firewall management users to arbitrary web domains.

Exploits (1)

exploitdb WORKING POC
by Ramikan · textwebappshardware
https://www.exploit-db.com/exploits/50414

This exploit demonstrates a Host Header Injection vulnerability in SonicWall SonicOS 7.0, allowing an attacker to spoof the Host header and redirect users to a malicious domain. The PoC shows how modifying the Host header in an HTTP request results in the injected domain appearing in the response.

Classification
Working Poc 90%
Attack Type
Other
Complexity
Trivial
Reliability
Reliable
Target: SonicWall SonicOS 7.0 (affects versions up to 6.5.3)
No auth needed
Prerequisites: Network access to the target SonicWall device
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Nuclei Templates (1)

SonicWall SonicOS 7.0 - Open Redirect
MEDIUMby gy741

References (2)

Core 2
Core References

Scores

CVSS v3 6.1
EPSS 0.1304
EPSS Percentile 95.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-601
Status published
Products (1)
sonicwall/sonicos < 7.0.1-r1262
Published Oct 12, 2021
Tracked Since Feb 18, 2026