CVE-2025-3110

EUVD-2025-210441
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
HTTP Request/Response Smuggling
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 17.87%
Affected Products (NVD)
VendorProductVersion
openvpnopenvpn_access_server
2.7.2 ≤
𝑥
≤ 3.1.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://openvpn.net/as-docs/as-3-2-release-notes.html