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CVE-2025-40631— HTTP host header injection vulnerability in IceWarp Mail Server

Quick assessment

Affected
Icewarp Icewarp Mail 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.

IceWarp Mail Server是捷克爱思华宝（IceWarp）公司的一款邮件服务器产品。该产品支持电子邮件归档、SmartAttach附件、自动迁移等。 IceWarp Mail Server 11.4.0版本存在安全漏洞，该漏洞源于HTTP主机标头注入，可能导致执行任意JavaScript代码。

AI Predicted 6.1 Difficulty: Easy EPSS 0.21% · P11
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I. Basic Information for CVE-2025-40631

Vulnerability Information
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Vulnerability Title
HTTP host header injection vulnerability in IceWarp Mail Server
Source: CVE Program / CVE List V5
Vulnerability Description
HTTP host header injection vulnerability in Icewarp Mail Server affecting version 11.4.0. By modifying the Host header and adding a payload, arbitrary JavaScript code can be executed on page load. The user must interact with a malicious link to be redirected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对HTTP头部进行脚本语法转义处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
IceWarp Mail Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IceWarp Mail Server是捷克爱思华宝（IceWarp）公司的一款邮件服务器产品。该产品支持电子邮件归档、SmartAttach附件、自动迁移等。 IceWarp Mail Server 11.4.0版本存在安全漏洞，该漏洞源于HTTP主机标头注入，可能导致执行任意JavaScript代码。
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
Icewarp Icewarp Mail Server 11.4.0 -

II. Public POCs for CVE-2025-40631

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III. Intelligence Information for CVE-2025-40631

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Vendor Advisories for CVE-2025-40631 (1)

Same Patch Batch · Icewarp · 2025-05-16 · 3 CVEs total

CVE-2025-40632 Cross-site scripting (XSS) vulnerability in IceWarp Mail Server
CVE-2025-40630 Open redirection vulnerability in IceWarp Mail Server

IV. Related Vulnerabilities

Same product: Icewarp Mail Server
Same vendor: Icewarp
Same weakness: CWE-644

V. Comments for CVE-2025-40631

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