Hi Iouri,
Thank you for contacting Syncfusion support.
Our file format libraries (Essential DocIO & Essential Presentation) are similar to the Microsoft Office COM libraries to iterate with the document elements explicitly and perform necessary manipulation. We doesn’t handled security related things when process with given documents (like detecting vulnerabilities and handling them). To avoid uploading malicious data from customer end, we suggest you to handle these kind of problems by scanning the customer inputs (Implementing well Network security or Antivirus) and then pass the input files to server machine.
Please let us know if you have any other questions.
Regards,
Manikandan Ravichandran