31 lines
1.9 KiB
Markdown
31 lines
1.9 KiB
Markdown
When run with the `--sanitize` switch, which is turned on by default (see
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[[usage]]), ikiwiki sanitizes the html on pages it renders to avoid XSS
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attacks and the like.
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ikiwiki excludes all html tags and attributes except for those that are
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whitelisted using the same lists as used by Mark Pilgrim's Universal Feed
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Parser, documented at <http://feedparser.org/docs/html-sanitization.html>.
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Notably it strips `style`, `link`, and the `style` attribute.
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ikiwiki uses the HTML::Scrubber perl module to perform its html
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sanitisation, and this perl module also deals with various entity encoding
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tricks.
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While I believe that this makes ikiwiki as resistant to malicious html
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content as anything else on the web, I cannot guarantee that it will
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actually protect every user of every browser from every browser security
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hole, badly designed feature, etc. I can provide NO WARRANTY, like it says
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in ikiwiki's [GPL](GPL) license.
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The web's security model is *fundamentally broken*; ikiwiki's html
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sanitisation is only a patch on the underlying gaping hole that is your web
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browser.
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----
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Some examples of embedded javascript that won't be let through.
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* <span style="background: url(javascript:window.location='http://example.org/')">test</span>
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* <span style="any: expression(window.location='http://example.org/')">test</span>
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* <span style="any: expression(window.location='http://example.org/')">test</span>
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