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issue-keyword class is being incorrectly stripped off spans (#16163) (#16172)

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Backport #16163

Bluemonday sanitizer regexp rules are not additive, so the addition of the icons,
emojis and chroma syntax policy has led to this being stripped.

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2021-06-16 11:35:54 +01:00 committed by GitHub
parent 946eb1321c
commit 849d316d8d
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 2 additions and 5 deletions
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7
modules/markup/sanitizer.go
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@ -50,9 +50,6 @@ func ReplaceSanitizer() {
sanitizer.policy.AllowURLSchemes(setting.Markdown.CustomURLSchemes...) sanitizer.policy.AllowURLSchemes(setting.Markdown.CustomURLSchemes...)
} }
// Allow keyword markup
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`^` + keywordClass + `$`)).OnElements("span")
// Allow classes for anchors // Allow classes for anchors
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`ref-issue`)).OnElements("a") sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`ref-issue`)).OnElements("a")
@ -68,8 +65,8 @@ func ReplaceSanitizer() {
// Allow classes for emojis // Allow classes for emojis
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`emoji`)).OnElements("img") sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`emoji`)).OnElements("img")
// Allow icons, emojis, and chroma syntax on span // Allow icons, emojis, chroma syntax and keyword markup on span
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`^((icon(\s+[\p{L}\p{N}_-]+)+)|(emoji))$|^([a-z][a-z0-9]{0,2})$`)).OnElements("span") sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`^((icon(\s+[\p{L}\p{N}_-]+)+)|(emoji))$|^([a-z][a-z0-9]{0,2})$|^` + keywordClass + `$`)).OnElements("span")
// Allow generally safe attributes // Allow generally safe attributes
generalSafeAttrs := []string{"abbr", "accept", "accept-charset", generalSafeAttrs := []string{"abbr", "accept", "accept-charset",