CVE-2025-8129 MEDIUM

CVE-2025-8129: KoaJS Koa HTTP Header response.js back redirect

Vendor Koajs
Product Koa
Weakness CWE-601 · Open redirect
Published July 25, 2025
Last update July 25, 2025
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CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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 open redirect. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Key dates

02Disclosure timeline

July 25, 2025 CVE published
July 25, 2025 Record updated