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CVE-2025-34078

7.8 · HIGH

A local privilege escalation vulnerability exists in NSClient++ 0.5.2.35 when both the web interface and ExternalScripts features are enabled.

Published Jul 2, 2025CWE-522EPSS 0.71%

Overview

CVE-2025-34078 is a high-severity vulnerability. It was published on July 2, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refraw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/local/nscp_pe.rbRefvulncheck.com/advisories/nsclient-localtoremote-system-compromiseRefwww.exploit-db.com/exploits/46802Refwww.exploit-db.com/exploits/48360

How CyberStrike helps

Frequently asked questions

What is CVE-2025-34078?

CVE-2025-34078 is a high-severity vulnerability. It was published on July 2, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-34078?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-34078?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-34078?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-34078 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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