Description
An authenticated remote code execution vulnerability exists in NSClient++ version 0.5.2.35 when the web interface and ExternalScripts module are enabled. A remote attacker with the administrator password can authenticate to the web interface (default port 8443), inject arbitrary commands as external scripts via the /settings/query.json API, save the configuration, and trigger the script via the /query/{name} endpoint. The injected commands are executed with SYSTEM privileges, enabling full remote compromise.
This capability is an intended feature, but the lack of safeguards or privilege separation makes it risky when exposed to untrusted actors.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| NSClient++ | NSClient++ | 0.5.2.35 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Metasploit 1 module
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NSClient++ 0.5.2.35 - ExternalScripts Authenticated Remote Code Execution
exploit/windows/http/nscp_authenticated_rce
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.