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CVE-2025-40630— Open redirection vulnerability in IceWarp Mail Server

Quick assessment

Affected
Icewarp Icewarp Mail Server
Exploitation
Public or AI PoC available; prioritize validation
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版本存在输入验证错误漏洞，该漏洞源于开放重定向，可能导致用户被重定向到任意域。

AI Predicted 5.3 Difficulty: Trivial EPSS 0.49% · P40

Public Exploits 1

Nuclei · 1 CVE-2025-40630.yaml [template]

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2025-40630

Vulnerability Information
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Vulnerability Title
Open redirection vulnerability in IceWarp Mail Server
Source: CVE Program / CVE List V5
Vulnerability Description
Open redirection vulnerability in IceWarp Mail Server affecting version 11.4.0. This vulnerability allows an attacker to redirect a user to any domain by sending a malicious URL to the victim, for example “ https://icewarp.domain.com//<MALICIOUS_DOMAIN>/%2e%2e” https://icewarp.domain.com///%2e%2e” . This vulnerability has been tested in Firefox.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
IceWarp Mail Server 输入验证错误漏洞
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版本存在输入验证错误漏洞，该漏洞源于开放重定向，可能导致用户被重定向到任意域。
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-2025-40630

# POC Description Source Link Shenlong Link
1 IceWarp Mail Server version 11.4.0 and below contains an open redirect vulnerability that allows attackers to redirect users to arbitrary external domains through malicious URLs. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-40630.yaml POC Details
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III. Intelligence Information for CVE-2025-40630

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Vendor Advisories for CVE-2025-40630 (1)

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

CVE-2025-40632 Cross-site scripting (XSS) vulnerability in IceWarp Mail Server
CVE-2025-40631 HTTP host header injection vulnerability in IceWarp Mail Server

IV. Related Vulnerabilities

Same product: Icewarp Mail Server
Same vendor: Icewarp
Same weakness: CWE-601

V. Comments for CVE-2025-40630

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