Medium severity · published Jul 25, 2025
CVE-2025-8129
KoaJS Koa HTTP Header response.js back redirect
6.1
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KO
Koa · KoaJS
3.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-8129
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-8129
Exploit
https://github.com/koajs/koa/issues/1892
Exploit
https://github.com/koajs/koa/issues/1892#issue-3213028583
Permissions Required
https://vuldb.com/?ctiid.317514
Third Party Advisory
https://vuldb.com/?id.317514
Third Party Advisory
https://vuldb.com/?submit.619741
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