Open Redirect in Koajs Koa

CVE-2025-8129

A vulnerability, which was classified as problematic, was found in KoaJS Koa up to 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…

Vulnerability class: Open Redirect

EPSS: 0.002 (13.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

  • cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
  • cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
  • cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
  • cna@vuldb.com (issue-tracking, Exploit, Patch, Issue Tracking, Vendor Advisory)
  • cna@vuldb.com (issue-tracking, Exploit, Patch, Third Party Advisory, exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2025-8129?
CVE-2025-8129 is a low-severity vulnerability in Koajs Koa, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 3.5/10. Published 2025-07-25.
How severe is CVE-2025-8129?
Low severity. CVSS v3 base score is 3.5 out of 10.
Is CVE-2025-8129 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.