CVE-2025-34078

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.

PUBLISHED Reserved 2025-04-15 | Published 2025-07-02 | Updated 2026-04-07 | Assigner VulnCheck

Problem types

CWE-522 Insufficiently Protected Credentials

Product status

Credits

kindredsec finder

BZYO finder

Yann Castel finder

References

raw.githubusercontent.com/...ploits/windows/local/nscp_pe.rb exploit

www.exploit-db.com/exploits/48360 exploit

www.exploit-db.com/exploits/46802 exploit

vulncheck.com/...es/nsclient-localtoremote-system-compromise third-party-advisory

cve.org (CVE-2025-34078)

nvd.nist.gov (CVE-2025-34078)

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