#VU119256 Insufficient verification of data authenticity in Cpp-httplib - CVE-2025-66577
Published: December 8, 2025
Vulnerability identifier: #VU119256
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-66577
CWE-ID: CWE-345
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Cpp-httplib
Cpp-httplib
Software vendor:
Cpp-httplib Project
Cpp-httplib Project
Description
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to software trusts data passed via the X-Forwarded-For/X-Real-IP headers. A remote attacker can modify these headers and poison log files or inject arbitrary HTTP headers into HTTP requests.
Remediation
Install updates from vendor's website.