Problem uploading a SVG

[pixelijn]

Maybe this helps to identify the problem:

SVG upload fail: The doctype must not reference external files

<script> tags are only one of many possible attacks that are possible with SVGs. SVG and XML are both quite complex languages that allow different kinds of dynamic imports. Because the reason for our Sane SVG and XML validators is security in the sense of XSS protection, we wanted to ensure that our implementation filters out every property that could be used for an attack and that isn’t needed in most legit SVG files. Unfortunately many design applications like Affinity Designer, Illustrator a…