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fix: strict matching of allowed content for sanitizer 

- _Simply_ add `^$` to regexp that didn't had it yet, this avoids any
content being allowed that simply had the allowed content as a
substring.
- Fix file-preview regex to have `$` instead of `*`.

(cherry picked from commit 7067cc7da4)

v7: added fix for ref-issue, this is already fixed in forgejo branch but
not backported as it was part of a feature.
This commit is contained in:
Gusted 2024-11-02 14:08:04 +01:00 committed by Earl Warren
parent c2284d871f
commit 3a197f7de2
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GPG Key ID: 0579CB2928A78A00
1 changed files with 5 additions and 5 deletions
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10
modules/markup/sanitizer.go
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@ -94,10 +94,10 @@ func createDefaultPolicy() *bluemonday.Policy {
}
// Allow classes for anchors
policy.AllowAttrs("class").Matching(regexp.MustCompile(`ref-issue( ref-external-issue)?`)).OnElements("a")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^ref-issue( ref-external-issue)?$`)).OnElements("a")
// Allow classes for task lists
policy.AllowAttrs("class").Matching(regexp.MustCompile(`task-list-item`)).OnElements("li")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^task-list-item$`)).OnElements("li")
// Allow classes for org mode list item status.
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^(unchecked|checked|indeterminate)$`)).OnElements("li")
@ -106,7 +106,7 @@ func createDefaultPolicy() *bluemonday.Policy {
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^icon(\s+[\p{L}\p{N}_-]+)+$`)).OnElements("i")
// Allow classes for emojis
policy.AllowAttrs("class").Matching(regexp.MustCompile(`emoji`)).OnElements("img")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^emoji$`)).OnElements("img")
// Allow icons, emojis, chroma syntax and keyword markup on span
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^((icon(\s+[\p{L}\p{N}_-]+)+)|(emoji)|(language-math display)|(language-math inline))$|^([a-z][a-z0-9]{0,2})$|^` + keywordClass + `$`)).OnElements("span")
@ -122,13 +122,13 @@ func createDefaultPolicy() *bluemonday.Policy {
policy.AllowAttrs("class").Matching(regexp.MustCompile("^header$")).OnElements("div")
policy.AllowAttrs("data-line-number").Matching(regexp.MustCompile("^[0-9]+$")).OnElements("span")
policy.AllowAttrs("class").Matching(regexp.MustCompile("^text small grey$")).OnElements("span")
policy.AllowAttrs("class").Matching(regexp.MustCompile("^file-preview*")).OnElements("table")
policy.AllowAttrs("class").Matching(regexp.MustCompile("^file-preview$")).OnElements("table")
policy.AllowAttrs("class").Matching(regexp.MustCompile("^lines-escape$")).OnElements("td")
policy.AllowAttrs("class").Matching(regexp.MustCompile("^toggle-escape-button btn interact-bg$")).OnElements("button")
policy.AllowAttrs("title").OnElements("button")
policy.AllowAttrs("class").Matching(regexp.MustCompile("^ambiguous-code-point$")).OnElements("span")
policy.AllowAttrs("data-tooltip-content").OnElements("span")
policy.AllowAttrs("class").Matching(regexp.MustCompile("muted|(text black)")).OnElements("a")
policy.AllowAttrs("class").Matching(regexp.MustCompile("^muted|(text black)$")).OnElements("a")
policy.AllowAttrs("class").Matching(regexp.MustCompile("^ui warning message tw-text-left$")).OnElements("div")
// Allow generally safe attributes