SB2025040144 - Improper input validation in React Router
Published: April 1, 2025 Updated: June 19, 2026
Security Bulletin ID
SB2025040144
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Input validation error (CVE-ID: CVE-2025-31137)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to spoof the URL used in an incoming request.
The vulnerability exists due to improper input validation in the Express adapter request handler when processing Host or X-Forwarded-Host headers. A remote attacker can send a specially crafted Host or X-Forwarded-Host header containing a URL pathname in the port section to spoof the URL used in an incoming request.
Remediation
Install update from vendor's website.