This is an archived bug report. If you are experiencing a similar issue, upgrade to the latest release and if that does not solve the problem, submit a new bug report
Lots of info on this by now in the support thread, including sample PDFs that do and don’t break with XSS filtering.
Since XSS is now universal default, this gets everyone trying to use the File Manager to upload PDFs which have printer preferance data.
Printer preferance data is a feature of the standardized PDF formats since at least 2002, so they are probably default on most PDF emitters.
ExpressionEngine implements Markdown Extra and BBCode. Please see the Markdown Extra docs and the BBCode Wikipedia article for a full reference.
**bold**, __bold__, *italics*, _italics_, ~strike/del~, `code()`
bold, italics, strike/del, code()
Link: [link title](https://example.com)
Image: 
[blockquote]...[/blockquote], [quote]...[/quote], and Markdown style:
> Some quoted text. > > This is all one quote.
[code]...[/code], and you can also specify the language for syntax highlighting, [code=php]...[/code]
GitHub flavored Markdown code fences are also supported:
```
public function decoderRing($str)
{
return str_rot13($str);
}
```