Is CVE-2025-40631 actively exploited?

CVE-2025-40631 has no public evidence of in-the-wild exploitation as of 2025-10-09.

What is the CVSS score for CVE-2025-40631?

CVE-2025-40631 has a CVSS score of 2 (LOW severity). Vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2025-40631?

Patch guidance is available from icewarp security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-40631.

Which products are affected by CVE-2025-40631?

1 product: icewarp mail server.

CVE-2025-40631 - remediation guidance & executive summary

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 Metrics

Vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: adjacent
Complexity: high
Privileges: none
User Action: active
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-644

Metadata

Primary Vendor: ICEWARP
Published: 5/16/2025
Last Modified: 10/9/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2025-40631

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary