GHSA-x2rg-q646-7m2vMediumCVSS 5.0

Koajs vulnerable to Cross-Site Scripting (XSS) at ctx.redirect() function

Published
April 9, 2025
Last Modified
October 5, 2025

🔗 CVE IDs covered (1)

CVE-2025-32379 →

📋 Description

Summary

In koa < 2.16.1 and < 3.0.0-alpha.5, passing untrusted user input to ctx.redirect() even after sanitizing it, may execute javascript code on the user who use the app.

Patches

This issue is patched in 2.16.1 and 3.0.0-alpha.5.

PoC

Coming soon...

Impact

  1. Redirect user to another phishing site
  2. Make request to another endpoint of the application based on user's cookie
  3. Steal user's cookie

🎯 Affected products2

  • npm/koa:< 2.16.1
  • npm/koa:>= 3.0.0-alpha.1, < 3.0.0-alpha.5

🔗 References (4)