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Merge pull request #3158 from overleaf/as-fix-react-replacement-tag-sanitisation
Fix stripping of "replacement" tags in translation strings for react-i18next GitOrigin-RevId: a83ed2810689b00c85c34a47afc92462907fd5de
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1 changed files with 23 additions and 1 deletions
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@ -44,9 +44,21 @@ async function run() {
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}
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run()
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/**
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* Sanitize a translation string to prevent injection attacks
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*
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* @param {string} input
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* @returns {string}
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*/
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function sanitize(input) {
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return sanitizeHtml(input, {
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allowedTags: ['b', 'strong', 'a', 'code'],
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// Allow "replacement" tags (in the format <0>, <1>, <2>, etc) used by
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// react-i18next to allow for HTML insertion via the Trans component.
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// See: https://github.com/overleaf/developer-manual/blob/master/code/translations.md
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// Unfortunately the sanitizeHtml library does not accept regexes or a
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// function for the allowedTags option, so we are limited to a hard-coded
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// number of "replacement" tags.
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allowedTags: ['b', 'strong', 'a', 'code', ...range(10)],
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allowedAttributes: {
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a: ['href', 'class']
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},
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@ -57,3 +69,13 @@ function sanitize(input) {
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}
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})
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}
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/**
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* Generate a range of numbers as strings up to the given size
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*
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* @param {number} size Size of range
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* @returns {string[]}
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*/
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function range(size) {
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return Array.from(Array(size).keys()).map(n => n.toString())
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}
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