Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2025-62595

21
FAUCET Score

CVE-2025-62595 is a bypass to a previous vulnerability in the Koa.js framework, affecting versions 2.16.2 to 2.16.3 and 3.0.1 to 3.0.3. This vulnerability allows an attacker to manipulate the Referer header, forcing a user's browser to an external, potentially malicious website due to incorrect handling of specially crafted URLs as safe relative paths. Rated 6.1 Medium (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N), it has a network attack vector, low complexity, and requires user interaction, potentially leading to phishing or social engineering. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.1, < 3.0.3CPE matchmatch criteria
cpe:2.3:a:koajs:koa:*:*:*:*:*:node.js:*:*
2.16.2CPE matchmatch criteria
cpe:2.3:a:koajs:koa:2.16.2:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.28%
Probability of exploitation in next 30 days
EPSS Percentile
19.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0028 is in the 20th percentile among its peer group of 26,234 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 (3)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: koaFixed in: 3.0.3
npmpatch availablevia ghsa
Product: koaFixed in: 2.16.3

Vendor Advisories (2)

redhatCVE-2025-62595Moderate

koa: Koa Vulnerable to Open Redirect via Trailing Double-Slash (//) in back Redirect Logic

Oct 21, 2025
npmGHSA-g8mr-fgfg-5qpcmedium

Koa Vulnerable to Open Redirect via Trailing Double-Slash (//) in back Redirect Logic

Oct 21, 2025

References

github.com / koajs/koa/commit/769fd75cc6b30d72493b370b5a3ae2332ca03c5b
Patch
github.com / koajs/koa/security/advisories/GHSA-g8mr-fgfg-5qpc
ExploitVendor Advisory