Goahead
CVE-2021-42342
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V5 - File Handling File type validation, storage isolation
MITRE ATT&CK
2 techniques across 2 tactics: Command and Control, Persistence The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | A remote attacker could upload malicious files that can be executed on the server by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAI
An issue was discovered in GoAhead 4.x and 5.x before 5.1.5. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate file types server-side, store uploads outside webroot, use random filenames, scan for malware.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Unrestricted File Upload (CWE-434), which allows attackers to upload malicious files that can be executed on the server. An issue was discovered in GoAhead 4.x and 5.x before 5.1.5. In the file upload filter, user form variables can be passed to CGI scripts without being prefixed with the CGI prefix. This permits tunneling untrusted environment variables into vulnerable CGI scripts. Affected products include: Embedthis Goahead. Version information: before 5.1.5..
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
An issue was discovered in GoAhead 4.x and 5.x before 5.1.5. In the file upload filter, user form variables can be passed to CGI scripts without being prefixed with the CGI prefix. This permits tunneling untrusted environment variables into vulnerable CGI scripts.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Malicious file upload attacks exploit insufficient validation when web applications accept user-provided files.
Affected Products (CPE)NVD
Embedthis GoAhead before 3.6.5 allows remote code execution if CGI is enabled and a CGI program is dynamically linked. R
EmbedThis GoAhead 3.0.0 through 3.4.1 does not properly handle path segments starting with a . Rated high severity (CVSS
A vulnerability in a custom-built GoAhead web server used on Foscam, Vstarcam, and multiple white-label IP camera models
An exploitable code execution vulnerability exists in the processing of multi-part/form-data requests within the base Go
A command-injection vulnerability exists in a web application on a custom-built GoAhead web server used on Foscam, Vstar
The HTTP Digest Authentication in the GoAhead web server before 5.1.2 does not completely protect against replay attacks
An issue was discovered in Embedthis GoAhead 2.5.0. Rated high severity (CVSS 8.6), this vulnerability is remotely explo
GoAhead 3.4.0 through 3.6.5 has a NULL Pointer Dereference in the websDecodeUrl function in http.c, leading to a crash f
A denial-of-service vulnerability exists in the processing of multi-part/form-data requests in the base GoAhead web serv
An issue was discovered in Embedthis GoAhead before 4.0.1 and Appweb before 7.0.2. Rated high severity (CVSS 7.5), this
An issue was discovered in Embedthis GoAhead before 4.0.1 and Appweb before 7.0.2. Rated high severity (CVSS 7.5), this
Embedthis GoAhead before 5.0.1 mishandles redirected HTTP requests with a large Host header. Rated medium severity (CVSS
Exploit-DB