CVE-2025-40631

HTTP host header injection vulnerability in IceWarp Mail Server

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.

Remediation

Solution:

  • The vulnerabilities have been fixed by the IceWarp team in the 13.0.2 version.

Category

2.0
CVSS
Severity: Low
CVSS 4.0 •
EPSS 0.02%
Affected: Icewarp Icewarp Mail Server
Published at:
Updated at:

References

Link Tags
https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-icewarp-mail-server

Frequently Asked Questions

What is the severity of CVE-2025-40631?
CVE-2025-40631 has been scored as a low severity vulnerability.
How to fix CVE-2025-40631?
To fix CVE-2025-40631: The vulnerabilities have been fixed by the IceWarp team in the 13.0.2 version.
Is CVE-2025-40631 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-40631 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-40631?
CVE-2025-40631 affects Icewarp Icewarp Mail Server.
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