Platform
other
Component
helloweb
Fixed in
2.0.1
CVE-2020-37034 describes an arbitrary file access vulnerability found in HelloWeb version 2.0. This flaw allows attackers to download sensitive system files by manipulating file path and filename parameters within HTTP GET requests. Successful exploitation could lead to the exposure of configuration data and other critical system information, potentially compromising the entire system. A fix is available; upgrading is the recommended remediation.
The primary impact of CVE-2020-37034 is the unauthorized disclosure of sensitive system files. An attacker can leverage directory traversal sequences within the filepath and filename parameters of the download.asp endpoint to bypass access controls. This allows them to download files they would not normally be permitted to access, such as configuration files containing database credentials, source code, or other sensitive data. The blast radius extends to any data accessible by the web server process. While the vulnerability doesn't directly lead to remote code execution, the exposed data could be used in subsequent attacks, such as privilege escalation or data breaches.
CVE-2020-37034 was published on 2026-01-30. There is no indication of active exploitation or inclusion in the CISA KEV catalog. Public proof-of-concept exploits are not widely available, but the vulnerability's nature makes it relatively straightforward to exploit given the lack of robust input validation. The vulnerability's simplicity increases the likelihood of exploitation if it remains unpatched.
Exploit Status
EPSS
0.21% (43% percentile)
CISA SSVC
CVSS Vector
The primary mitigation for CVE-2020-37034 is to upgrade HelloWeb to a patched version. Since a specific fixed version isn't provided, thoroughly review the vendor's advisory for the latest release. As a temporary workaround, implement strict input validation on the filepath and filename parameters in the download.asp script, preventing directory traversal sequences (e.g., ../). Web Application Firewalls (WAFs) can be configured with rules to block requests containing suspicious directory traversal patterns. Monitor web server access logs for unusual file access attempts, specifically targeting download.asp with unusual parameters.
Actualizar a una versión parcheada o descontinuar el uso de HelloWeb 2.0. Como medida temporal, se puede implementar una validación exhaustiva de las entradas de usuario en los parámetros filepath y filename para prevenir el acceso a archivos no autorizados.
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CVE-2020-37034 is a vulnerability in HelloWeb 2.0 allowing attackers to download system files by manipulating parameters. It has a CVSS score of 7.5 (HIGH).
If you are running HelloWeb version 2.0, you are potentially affected. Upgrade to a patched version as soon as possible.
Upgrade HelloWeb to the latest available version. Implement input validation on the filepath and filename parameters as a temporary workaround.
There is no confirmed active exploitation currently, but the vulnerability's simplicity makes it a potential target.
Refer to the vendor's website or security advisories for the latest information and updates regarding CVE-2020-37034.
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