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CVE-2025-8129

19
FAUCET Score

CVE-2025-8129 is an open redirect vulnerability affecting KoaJS Koa versions up to 3.0.0, specifically within the 'back' function of the 'lib/response.js' component. This medium-severity vulnerability (CVSS 6.1) can be exploited remotely with low attack complexity, requiring user interaction, and could lead to information disclosure and integrity impacts. While the exploit has been publicly disclosed, there is no evidence of active exploitation, nor are there known Metasploit or Nuclei modules, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, < 2.16.2CPE matchmatch criteria
cpe:2.3:a:koajs:koa:*:*:*:*:*:node.js:*:*
3.0.0CPE matchmatch criteria
cpe:2.3:a:koajs:koa:3.0.0:-:*:*:*:node.js:*:*
3.0.0CPE matchmatch criteria
cpe:2.3:a:koajs:koa:3.0.0:alpha0:*:*:*:node.js:*:*
3.0.0CPE matchmatch criteria
cpe:2.3:a:koajs:koa:3.0.0:alpha1:*:*:*:node.js:*:*
3.0.0CPE matchmatch criteria
cpe:2.3:a:koajs:koa:3.0.0:alpha2:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 4.0

2.0LOW

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

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
VS Confidentiality
NONE
VS Integrity
LOW
VS Availability
NONE
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
PROOF_OF_CONCEPT
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.23%
Probability of exploitation in next 30 days
EPSS Percentile
13.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0023 is in the 14th percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (21)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: koaFixed in: 2.16.2
npmpatch availablevia ghsa
Product: koaFixed in: 3.0.1
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 3Fixed in: openshift-service-mesh/istio-rhel9-operator
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 2Fixed in: openshift-service-mesh/grafana-rhel8
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 2Fixed in: openshift-service-mesh/istio-cni-rhel8
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 2Fixed in: openshift-service-mesh/istio-must-gather-rhel9
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 2Fixed in: openshift-service-mesh/istio-operator-bundle
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 2Fixed in: openshift-service-mesh/istio-rhel8-operator
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 2Fixed in: openshift-service-mesh/pilot-rhel8
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 2Fixed in: openshift-service-mesh/proxyv2-rhel9
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 2Fixed in: openshift-service-mesh/ratelimit-rhel8
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 3Fixed in: openshift-service-mesh-dev-preview-beta/istio-ztunnel-rhel9
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 3Fixed in: openshift-service-mesh/istio-cni-rhel9
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 3Fixed in: openshift-service-mesh/istio-must-gather-rhel9
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 3Fixed in: openshift-service-mesh/istio-pilot-rhel9
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 3Fixed in: openshift-service-mesh/istio-proxyv2-rhel9
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 3Fixed in: openshift-service-mesh/istio-sail-operator-bundle
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 3Fixed in: openshift-service-mesh-tech-preview/istio-ztunnel-rhel9
redhatvendor investigatingvia redhat_api
Product: Red Hat Developer HubFixed in: rhdh/rhdh-hub-rhel9
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Dev SpacesFixed in: devspaces/code-rhel9

Vendor Advisories (2)

npmGHSA-jgmv-j7ww-jx2xlow

Koa Open Redirect via Referrer Header (User-Controlled)

Jul 29, 2025
redhatCVE-2025-8129Moderate

koa: KoaJS Koa HTTP Header response.js back redirect

Jul 25, 2025

References

github.com / koajs/koa/issues/1892
ExploitIssue TrackingPatchVendor Advisory
github.com / koajs/koa/issues/1892
ExploitIssue TrackingPatchThird Party AdvisoryVendor Advisory
vuldb.com
Permissions RequiredVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry