2024-11-25
This article describes a potential Cross-Site Scripting (XSS) vulnerability in the `error.html` template used by SvelteKit for error handling.
Vulnerability: XSS in error messages
Severity: Low (user-controlled input needed in error message)
Date: Not specified
What Undercode Says:
SvelteKit’s `error.html` template displays error messages. The placeholders within this template are replaced without proper escaping, potentially allowing for XSS attacks if an application explicitly creates an error message containing user-controlled content. This vulnerability cannot be exploited with uncaught errors, as they always render a generic “Internal error” message.
Mitigation:
– Escape user-controlled input before including it in error messages generated on the server-side.
Impact:
Only applications that incorporate user input into custom error messages on the server are vulnerable. Most applications are not affected.
References:
Reported By: Github.com
Undercode AI: https://ai.undercodetesting.com
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