CVE-2025-8129

Name: CVE-2025-8129
Creator: NVD / NIST
Published: 2025-07-25T05:15:36.98+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2/10EPSS 0.23%

Last modified Jun 17, 2026

CVE-2025-8129 is a low-severity vulnerability rated 2/10 on the CVSS scale. 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. EPSS estimates a 0.23% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS 4.0

2/10

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.23%

13.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Koajs	Koa	>= 2.0.0, < 2.16.2
Koajs	Koa	3.0.0

References

https://github.com/koajs/koa/issues/1892Exploit, Issue Tracking, Patch, Vendor Advisory
https://github.com/koajs/koa/issues/1892#issue-3213028583Exploit, Issue Tracking, Patch, Third Party Advisory, Vendor Advisory
https://vuldb.com/?ctiid.317514Permissions Required, VDB Entry
https://vuldb.com/?id.317514Third Party Advisory, VDB Entry
https://vuldb.com/?submit.619741Third Party Advisory, VDB Entry
https://github.com/koajs/koa/issues/1892Exploit, Issue Tracking, Patch, Vendor Advisory

Timeline

Published: Jul 25, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-8129?

How severe is CVE-2025-8129?

CVE-2025-8129 has a CVSS score of 2/10 (LOW severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.

How do I fix CVE-2025-8129?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-8129?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST