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Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVE-2025-32388

Medium
5.4/10

Summary

SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. In @sveltejs/kit package versions 2.0.0 through 2.20.5, unsanitized search param names cause a Cross-site Scripting vulnerability. You are affected if you iterate over all entries of "event.url.searchParams" inside a "server load" function. Attackers can exploit it by crafting a malicious URL and getting a user to click a link with said URL. This vulnerability is fixed in 2.20.6.

  • LOW
  • NETWORK
  • LOW
  • UNCHANGED
  • REQUIRED
  • NONE
  • LOW
  • NONE

CWE-79 - Cross Site Scripting

Cross-Site Scripting, commonly referred to as XSS, is the most dominant class of vulnerabilities. It allows an attacker to inject malicious code into a pregnable web application and victimize its users. The exploitation of such a weakness can cause severe issues such as account takeover, and sensitive data exfiltration. Because of the prevalence of XSS vulnerabilities and their high rate of exploitation, it has remained in the OWASP top 10 vulnerabilities for years.

References

Advisory Timeline

  • Published