Potential fix for code scanning alert no. 3: Reflected cross-site scripting #38
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…ipting Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
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Potential fix for https://github.com/hyperjumptech/whatsapp-chatbot-connector/security/code-scanning/3
To resolve the reflected XSS vulnerability, any data from
req.query["hub.challenge"]incorporated into the response should be properly encoded before sending it to the client. Since the functionality requires echoing the challenge value, we should use output encoding to prevent execution of injected scripts. The best way in Node.js/Express is to use the well-knownescape-htmlpackage, which escapes special HTML characters, neutralizing any embedded scripts. Amend the code so that before sendingchallengeback in the response (line 37), you encode it usingescape-html. This requires importing the package and using it at the appropriate response location. All changes are confined to api/webhook.ts.Suggested fixes powered by Copilot Autofix. Review carefully before merging.