Security Recommendations for SelectPdf Library
If you convert your own files to pdf and know exactly what they contain, you are fine. But if you take external files/code to convert to PDF from users you do not know, follow the following recommendations.
If you only access the system from certain locations, restrict the access to it limiting the IP addresses allowed.
Disable access to local files
If you do not need to access local server files during the conversion, disable access setting the following property: