CVE-2025-40631 — MEDIUM (6.1)

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.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Icewarp	Mail Server	11.4.0

Related Weaknesses (CWE)

CWE-644

References

https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-icewThird Party Advisory

FAQ

What is CVE-2025-40631?

CVE-2025-40631 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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...

How severe is CVE-2025-40631?

CVE-2025-40631 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-40631?

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