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

Quick assessment

Affected
KoaJS Koa
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

koa是Koa.js开源的一个使用node.js表达性中间件。 koa 3.0.0及之前版本存在安全漏洞，该漏洞源于HTTP标头处理组件中参数Referrer的错误操作，可能导致开放重定向。

CVSS 3.5 · Low EPSS 0.23% · P14

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2025-8129

Vulnerability Information
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Vulnerability Title
KoaJS Koa HTTP Header response.js back redirect
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
koa 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
koa是Koa.js开源的一个使用node.js表达性中间件。 koa 3.0.0及之前版本存在安全漏洞，该漏洞源于HTTP标头处理组件中参数Referrer的错误操作，可能导致开放重定向。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
KoaJS Koa 3.0 -

II. Public POCs for CVE-2025-8129

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III. Intelligence Information for CVE-2025-8129

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News Coverage for CVE-2025-8129 (1)

IV. Related Vulnerabilities

Same product: Koa
Same vendor: KoaJS
Same weakness: CWE-601

V. Comments for CVE-2025-8129

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