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URL Redirection to Untrusted Site ('Open Redirect') in koa

CVE-2025-8129

  • koa
Medium
5.1/10

Summary

A vulnerability, which was classified as problematic, was found in KoaJS Koa versions through 2.16.1 and versions 3.0.0-alpha0 through 3.0.0. Affected is the function "back()" in the library "lib/response.js" of the component HTTP Header Handler. The manipulation of the argument Referrer leads to open redirect. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

  • LOW
  • NETWORK
  • LOW
  • CHANGED
  • REQUIRED
  • NONE
  • LOW
  • NONE

CWE-601 - Open Redirect

An open redirect attack employs a URL parameter, HTML refresh tags, or a DOM based location change to exploit the trust of a vulnerable domain to direct the users to a malicious website. The attack could lead to higher severity vulnerabilities such as unauthorized access control, account takeover, XSS, and more.

References

Advisory Timeline

  • Published