CVE-2025-34078— NSClient++ 0.5.2.35 Local Privilege Escalation via ExternalScripts and Web Interface
Quick assessment
Affected
NSClient++ NSClient++
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
NSClient++是NSClient开源的一个用于Windows系统的监控代理程序。 NSClient++ 0.5.2.35版本存在安全漏洞，该漏洞源于配置不安全，可能导致权限提升。
Public Exploits 1
Metasploit · 1
nscp_pe.rb [exploit]
Possible ATT&CK Techniques 3 AI
T1059 · Command and Scripting Interpreter T1068 · Exploitation for Privilege Escalation T1136.001 · Local Account
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I. Basic Information for CVE-2025-34078
Vulnerability Information
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Vulnerability Title
NSClient++ 0.5.2.35 Local Privilege Escalation via ExternalScripts and Web Interface
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5
Vulnerability Title
NSClient++ 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NSClient++是NSClient开源的一个用于Windows系统的监控代理程序。 NSClient++ 0.5.2.35版本存在安全漏洞，该漏洞源于配置不安全，可能导致权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| NSClient++ | NSClient++ | 0.5.2.35 | - |
|
II. Public POCs for CVE-2025-34078
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Exploits & Public PoCs for CVE-2025-34078 (1)
IV. Related Vulnerabilities
Same weakness: CWE-522
V. Comments for CVE-2025-34078
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