CVE-2025-62595 (GCVE-0-2025-62595)

Vulnerability from cvelistv5 – Published: 2025-10-21 16:20 – Updated: 2025-10-21 16:35
VLAI
Title
Koa Vulnerable to Open Redirect via Trailing Double-Slash (//) in back Redirect Logic
Summary
Koa is expressive middleware for Node.js using ES2017 async functions. In versions 2.16.2 to before 2.16.3 and 3.0.1 to before 3.0.3, a bypass to CVE-2025-8129 was discovered in the Koa.js framework affecting its back redirect functionality. In certain circumstances, an attacker can manipulate the Referer header to force a user’s browser to navigate to an external, potentially malicious website. This occurs because the implementation incorrectly treats some specially crafted URLs as safe relative paths. Exploiting this vulnerability could allow attackers to perform phishing, social engineering, or other redirect-based attacks on users of affected applications. This issue has been patched in version 3.0.3.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-21 16:35 UTC
CWE
  • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7628 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
koajs koa Affected: >= 2.16.2, < 2.16.3
Affected: >= 3.0.1, < 3.0.3
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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