CVE-2025-34078

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-34078
A local privilege escalation vulnerability exists in NSClient++ 0.5.2.35 when both the web interface and ExternalScripts features are enabled. The configuration file (nsclient.ini) stores the administrative password in plaintext and is readable by local users. By extracting this password, an attacker can authenticate to the NSClient++ web interface (typically accessible on port 8443) and abuse the ExternalScripts plugin to inject and execute arbitrary commands as SYSTEM by registering a custom script, saving the configuration, and triggering it via the API. This behavior is documented but insecure, as the plaintext credential exposure undermines access isolation between local users and administrative functions.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/local/nscp_pe.rb Exploit Third Party Advisory
https://vulncheck.com/advisories/nsclient-localtoremote-system-compromise Exploit Third Party Advisory
https://www.exploit-db.com/exploits/46802 Exploit VDB Entry Third Party Advisory
https://www.exploit-db.com/exploits/48360 Exploit VDB Entry
Configurations

Configuration 1 (hide)

cpe:2.3:a:nsclient:nsclient\+\+:0.5.2.35:*:*:*:*:*:*:*
History

17 Sep 2025, 13:32

Type Values Removed Values Added
CPE cpe:2.3:a:nsclient:nsclient\+\+:0.5.2.35:*:*:*:*:*:*:*
First Time Nsclient
Nsclient nsclient\+\+
CWE CWE-522
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
References () https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/local/nscp_pe.rb - () https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/local/nscp_pe.rb - Exploit, Third Party Advisory
References () https://vulncheck.com/advisories/nsclient-localtoremote-system-compromise - () https://vulncheck.com/advisories/nsclient-localtoremote-system-compromise - Exploit, Third Party Advisory
References () https://www.exploit-db.com/exploits/46802 - () https://www.exploit-db.com/exploits/46802 - Exploit, VDB Entry, Third Party Advisory
References () https://www.exploit-db.com/exploits/48360 - () https://www.exploit-db.com/exploits/48360 - Exploit, VDB Entry

03 Jul 2025, 15:13

Type Values Removed Values Added
Summary
  • (es) Existe una vulnerabilidad de escalada de privilegios local en NSClient++ 0.5.2.35 cuando tanto la interfaz web como las funciones de ExternalScripts están habilitadas. El archivo de configuración (nsclient.ini) almacena la contraseña administrativa en texto plano y es legible para los usuarios locales. Al extraer esta contraseña, un atacante puede autenticarse en la interfaz web de NSClient++ (normalmente accesible en el puerto 8443) y abusar del complemento ExternalScripts para inyectar y ejecutar comandos arbitrarios como SYSTEM. Para ello, registra un script personalizado, guarda la configuración y lo activa mediante la API. Este comportamiento está documentado, pero es inseguro, ya que la exposición de las credenciales en texto plano vulnera el aislamiento de acceso entre los usuarios locales y las funciones administrativas.

02 Jul 2025, 20:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-07-02 20:15

Updated : 2025-09-17 13:32

NVD link : CVE-2025-34078

Mitre link : CVE-2025-34078

CVE.ORG link : CVE-2025-34078

JSON object : View

Products Affected

nsclient

  • nsclient\+\+
CWE
CWE-269

Improper Privilege Management

CWE-312

Cleartext Storage of Sensitive Information

CWE-522

Insufficiently Protected Credentials