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SonicWall SonicOS 7.0 - Open Redirect Detection

🗓️ 28 Jul 2026 11:27:38Reported by KittySploitType 
kittysploit
 kittysploit
🔗 kittysploit.com

SonicWall SonicOS 7.0 contains an open redirect via implicitly trusted Host headers.

Related
Refs
Code
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zdt
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Sonicwall SonicOS 7.0 - Host Header Injection Vulnerability
13 Oct 202100:00
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attackerkb
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CVE-2021-20031
12 Oct 202123:15
–attackerkb
circl
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CVE-2021-20031
13 Oct 202102:25
–circl
cnnvd
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SonicOS 输入验证错误漏洞
12 Oct 202100:00
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cve
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CVE-2021-20031
12 Oct 202122:55
–cve
cvelist
Cvelist
CVE-2021-20031
12 Oct 202122:55
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exploitdb
Exploit DB
Sonicwall SonicOS 7.0 - Host Header Injection
13 Oct 202100:00
–exploitdb
ncsc
NCSC
Vulnerability fixed in SonicOS
13 Oct 202100:00
–ncsc
nuclei
Nuclei
SonicWall SonicOS 7.0 - Open Redirect
14 Oct 202602:05
–nuclei
nvd
NVD
CVE-2021-20031
12 Oct 202123:15
–nvd
Rows per page
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""SonicWall SonicOS 7."""

from kittysploit import *
from lib.protocols.http.http_client import Http_client


class Module(Scanner, Http_client):
    __info__ = {
        'name': 'SonicWall SonicOS 7.0 - Open Redirect Detection',
        'description': 'SonicWall SonicOS 7.0 contains an open redirect vulnerability. The values of the Host headers are implicitly set as trusted. An attacker can spoof a particular host header, allowing the attacker to render arbitrary links, obtain sensitive information, modify data, execute unauthorized operations. and/or possibly redirect a user to a malicious site.',
        'author': ['KittySploit Team'],
        'severity': 'medium',
        'tags': ['web', 'scanner', 'cve', 'cve2021', 'sonicwall', 'redirect', 'edb', 'packetstorm', 'vuln'],
        'agent': {
            'risk': 'active',
            'effects': ['network_probe'],
            'expected_requests': 1,
            'reversible': True,
            'approval_required': False,
            'produces': ['tech_hints', 'risk_signals', 'endpoints'],
            'cost': 1.0,
            'noise': 0.3,
            'value': 1.0,
            'requires': {
                'min_endpoints': 0,
                'min_params': 0,
                'tech_hints_any': [],
                'tech_hints_all': [],
                'specializations_any': [],
                'risk_signals_any': [],
                'auth_session': False,
                'capabilities_any': [],
                'capabilities_all': [],
                'confidence_min': {},
                'confidence_min_any': {},
                'endpoint_pattern_any': [],
                'param_any': [],
                'api_surface_ready': False,
            },
            'chain': {
                'produces_capabilities': [
                    {
                        'capability': 'admin_surface',
                        'from_detail': '',
                    },
                ],
                'consumes_capabilities': [],
                'option_bindings': {},
                'suggested_followups': ['auxiliary/scanner/http/login_page_detector'],
            },
        },
        'references': [
            'https://www.exploit-db.com/exploits/50414',
            'https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0019',
            'http://packetstormsecurity.com/files/164502/Sonicwall-SonicOS-7.0-Host-Header-Injection.html',
            'https://nvd.nist.gov/vuln/detail/CVE-2021-20031',
            'https://github.com/ARPSyndicate/cvemon',
        ],
        'cve': 'CVE-2021-20031',
    }

    def run(self):
        r = self.http_request(method="GET", path='/', allow_redirects=False)
        if not r or r.status_code != 200:
            return False
        body = r.text or ""
        body_all = ('https://{{randstr}}.tld/auth.html', 'Please be patient as you are being re-directed',)
        if (all(m in body for m in body_all)):
            self.set_info(
                severity='medium',
                reason="SonicWall SonicOS 7.0 - Open Redirect detected",
                path='/',
            )
            return True
        return False

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28 Jul 2026 11:27Current
CVSS 25.8
CVSS 3.16.1
EPSS0.13041
0