1. Home
  2. CVE Database
  3. CVE-2025-3110
HIGH · 7.5

CVE-2025-3110

OpenVPN Access Server 2.7.2 through 3.1.0 accepts bare line-feed sequences inside HTTP header values, allowing remote attackers to perform HTTP request smuggling when deployed behind a reverse proxy

Vulnerability Description

OpenVPN Access Server 2.7.2 through 3.1.0 accepts bare line-feed sequences inside HTTP header values, allowing remote attackers to perform HTTP request smuggling when deployed behind a reverse proxy

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
OpenvpnOpenvpn Access Server>= 2.7.2, <= 3.1.0

Related Weaknesses (CWE)

CWE-444

References

FAQ

What is CVE-2025-3110?

CVE-2025-3110 is a vulnerability with a CVSS score of 7.5 (HIGH). OpenVPN Access Server 2.7.2 through 3.1.0 accepts bare line-feed sequences inside HTTP header values, allowing remote attackers to perform HTTP request smuggling when deployed behind a reverse proxy

How severe is CVE-2025-3110?

CVE-2025-3110 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-3110?

Check the references section above for vendor advisories and patch information. Affected products include: Openvpn Openvpn Access Server.