Citrix · Citrix Netscaler Vpx · CVE-2018-6186
**Name of the Vulnerable Software and Affected Versions**
Citrix NetScaler VPX versions prior to NS12.0 53.13.nc
**Description**
The issue is related to insufficient validation of incoming requests in Citrix NetScaler, allowing a remote attacker with webapp privileges to exploit the vulnerability. This can lead to access to the nsroot account and execution of arbitrary commands with root privileges via Server-Side Request Forgery (SSRF) attacks using the "/rapi/read url" API endpoint.
**Recommendations**
For Citrix NetScaler VPX versions prior to NS12.0 53.13.nc, consider restricting access to the /rapi/read url URI to prevent SSRF attacks until a patch is available. As a temporary workaround, limit the privileges of webapp accounts to minimize the risk of exploitation.