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sanitize javascript url to prevent XSS #80

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sanitize javascript url to prevent XSS #80

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11 changes: 10 additions & 1 deletion packages/click-to-react-component/src/ClickToComponent.js
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@ export const State = /** @type {const} */ ({
SELECT: 'SELECT',
})

const isJavaScriptProtocol = /^[\u0000-\u001F ]*j[\r\n\t]*a[\r\n\t]*v[\r\n\t]*a[\r\n\t]*s[\r\n\t]*c[\r\n\t]*r[\r\n\t]*i[\r\n\t]*p[\r\n\t]*t[\r\n\t]*\:/i

/**
* @param {Props} props
*/
Expand Down Expand Up @@ -48,6 +50,10 @@ export function ClickToComponent({ editor = 'vscode', pathModifier }) {
})

event.preventDefault()
if (isJavaScriptProtocol.test(url)) {
console.warn(`ClickToComponent has blocked a javascript: URL as a security precaution`);
return;
}
window.location.assign(url)

setState(State.IDLE)
Expand All @@ -63,7 +69,10 @@ export function ClickToComponent({ editor = 'vscode', pathModifier }) {
editor,
pathToSource: returnValue,
})

if (isJavaScriptProtocol.test(url)) {
console.warn(`ClickToComponent has blocked a javascript: URL as a security precaution`);
return;
}
window.location.assign(url)
}

Expand Down