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CVE-2025-3110

Quick assessment

Affected
OpenVPN Access Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenVPN Access Server是OpenVPN公司的一款企业级VPN远程访问服务软件。 OpenVPN Access Server 2.7.2版本至3.1.0版本存在输入验证错误漏洞，该漏洞源于接受HTTP标头值中的裸换行序列，当部署在反向代理后面时，允许远程攻击者执行HTTP请求夹带。

AI Predicted 7.5 Difficulty: Easy EPSS 0.45% · P36

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
OpenVPN Access Server 2.7.2≤ 3.1.0 affected
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I. Basic Information for CVE-2025-3110

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
OpenVPN Access Server 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenVPN Access Server是OpenVPN公司的一款企业级VPN远程访问服务软件。 OpenVPN Access Server 2.7.2版本至3.1.0版本存在输入验证错误漏洞，该漏洞源于接受HTTP标头值中的裸换行序列，当部署在反向代理后面时，允许远程攻击者执行HTTP请求夹带。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenVPN Access Server 2.7.2 ~ 3.1.0 -

II. Public POCs for CVE-2025-3110

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III. Intelligence Information for CVE-2025-3110

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Vendor Pages for CVE-2025-3110 (1)

IV. Related Vulnerabilities

Same product: Access Server
Same vendor: OpenVPN
Same weakness: CWE-444

V. Comments for CVE-2025-3110

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