Input validation error in nest - CVE-2025-69211
Published: December 29, 2025
Vulnerability identifier: #VU120626
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-69211
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: nestjs
Affected software:
nest
nest
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to insufficient validation of user-supplied input within the @nestjs/platform-fastify component. A remote non-authenticated attacker can bypass authentication process by providing url-encoded representations of characters in application routes and gain unauthorized access to the application.
How to mitigate CVE-2025-69211
Install updates from vendor's website.