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fix(flat-pages): avoid JavaScript protocol in redirect URL #2135

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merged 1 commit into from
Mar 20, 2024
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fix(flat-pages): avoid JavaScript protocol in redirect URL #2135

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13 changes: 12 additions & 1 deletion packages/flat-pages/src/LoginPage/utils/state.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,17 @@ export function useMachine(): [any, (type: ToggleEventsType) => void] {
return [currentState, setCurrentState];
}

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;

function sanitizeURL(url: string | null): string | null {
if (url && isJavaScriptProtocol.test(url)) {
console.warn("Refuse to redirect to", url);
return null;
}
return url;
}

export interface LoginState {
currentState: any;
setCurrentState: (type: ToggleEventsType) => void;
Expand All @@ -55,7 +66,7 @@ export function useLoginState(): LoginState {
const [loginResult, setLoginResult] = useState<LoginProcessResult | null>(null);

const [redirectURL] = useState(() =>
new URLSearchParams(window.location.search).get("redirect"),
sanitizeURL(new URLSearchParams(window.location.search).get("redirect")),
);

const [currentState, setCurrentState] = useMachine();
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