shell bypass 403
<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" xmlns="http://www.w3.org/2000/svg">
<filter id="blur">
<feGaussianBlur stdDeviation="3" />
</filter>
<filter id="svgBlur" x="0%" y="0%" width="110%" height="110%">
<feGaussianBlur in="SourceGraphic" stdDeviation="3"/>
</filter>
</svg>