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css sanitizer allows "rem" sizes #177

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merged 1 commit into from Nov 25, 2019
Merged

css sanitizer allows "rem" sizes #177

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2 changes: 1 addition & 1 deletion lib/loofah/html5/scrub.rb
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Expand Up @@ -6,7 +6,7 @@ module HTML5 # :nodoc:
module Scrub

CONTROL_CHARACTERS = /[`\u0000-\u0020\u007f\u0080-\u0101]/
CSS_KEYWORDISH = /\A(#[0-9a-fA-F]+|rgb\(\d+%?,\d*%?,?\d*%?\)?|-?\d{0,3}\.?\d{0,10}(cm|em|ex|in|mm|pc|pt|px|%|,|\))?)\z/
CSS_KEYWORDISH = /\A(#[0-9a-fA-F]+|rgb\(\d+%?,\d*%?,?\d*%?\)?|-?\d{0,3}\.?\d{0,10}(cm|r?em|ex|in|mm|pc|pt|px|%|,|\))?)\z/
CRASS_SEMICOLON = {:node => :semicolon, :raw => ";"}

class << self
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6 changes: 6 additions & 0 deletions test/html5/test_sanitizer.rb
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Expand Up @@ -294,6 +294,12 @@ def test_css_high_precision_value_shorthand_css_properties
assert_match %r/0.3333333334em/, sane.inner_html
end

def test_css_rem_value
html = "<span style=\"margin-top:10rem;\">"
sane = Nokogiri::HTML(Loofah.scrub_fragment(html, :escape).to_xml)
assert_match %r/10rem/, sane.inner_html
end

def test_css_function_sanitization_leaves_safelisted_functions_calc
html = "<span style=\"width:calc(5%)\">"
sane = Nokogiri::HTML(Loofah.scrub_fragment(html, :strip).to_html)
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