Local Privilege Escalation Vulnerability in NSClient++ by NSClient Inc.
CVE-2025-34078

7.3HIGH

Key Information:

Vendor

Nsclient++

Status
Nsclient++
Vendor
CVE Published:
2 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-34078?

A potential local privilege escalation risk exists in NSClient++ 0.5.2.35 due to improper handling of credentials. When both the web interface and ExternalScripts capabilities are active, the configuration file (nsclient.ini) exposes the administrative password in plaintext format. Local users can read this sensitive information, allowing them to authenticate to the web interface, commonly on port 8443. By exploiting this vulnerability, a malicious actor can leverage the ExternalScripts plugin to execute arbitrary commands with SYSTEM privileges by crafting custom scripts and triggering them through the API. The plaintext password vulnerability undermines proper access controls, posing significant security implications.

Affected Version(s)

NSClient++ Windows 0.5.2.35

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-34078 - Proof of Concept

CVE-2025-34078 - Proof of Concept

CVE-2025-34078 - Proof of Concept

References

https://raw.githubusercontent.com/rapid7/metasploit-frame...
exploit
https://www.exploit-db.com/exploits/48360
exploit
https://www.exploit-db.com/exploits/46802
exploit

CVSS V4

Score:
7.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

kindredsec
BZYO
Yann Castel
.
CVE-2025-34078 : Local Privilege Escalation Vulnerability in NSClient++ by NSClient Inc.