How severe is CVE-2025-40630?

CVE-2025-40630 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-40630 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-40630?

CVE-2025-40630 affects Icewarp Mail Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-40630?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-40630 have an EU (EUVD) identifier?

Yes. CVE-2025-40630 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-15436.

When was CVE-2025-40630 published?

CVE-2025-40630 was published on 2025-05-16 and last updated on 2026-06-17.

CVE-2025-40630

CVE-2025-40630 is a medium-severity vulnerability in Icewarp Mail Server with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 5.1
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-15436
Weakness: CWE-601
Affected product: Icewarp Mail Server
Published: 2025-05-16
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-40630?: 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.
How severe is CVE-2025-40630?: CVE-2025-40630 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-40630 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-40630?: CVE-2025-40630 affects Icewarp Mail Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-40630?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-40630 have an EU (EUVD) identifier?: Yes. CVE-2025-40630 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-15436.
When was CVE-2025-40630 published?: CVE-2025-40630 was published on 2025-05-16 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:icewarp:mail_server:11.4.0:*:*:*:*:*:*:*

More vulnerabilities in Icewarp Mail Server

CVE-2023-39699 — Critical (CVSS 9.8): IceWarp Mail Server v10.4.5 was discovered to contain a local file inclusion (LFI) vulnerability via the component…
CVE-2020-14066 — High (CVSS 8.8): IceWarp Email Server 12.3.0.1 allows remote attackers to upload JavaScript files that are dangerous for clients to…
CVE-2019-12593 — High (CVSS 7.5): IceWarp Mail Server through 10.4.4 is prone to a local file inclusion vulnerability via…
CVE-2015-1503 — High (CVSS 7.5): Multiple directory traversal vulnerabilities in IceWarp Mail Server before 11.2 allow remote attackers to read…
CVE-2020-14065 — Medium (CVSS 6.5): IceWarp Email Server 12.3.0.1 allows remote attackers to upload files and consume disk space.
CVE-2020-14064 — Medium (CVSS 6.5): IceWarp Email Server 12.3.0.1 has Incorrect Access Control for user accounts.

All CVEs affecting Icewarp Mail Server →

Other CWE-601 (Open Redirect) vulnerabilities

CVE-2018-3774 — Critical (CVSS 10.0): Incorrect parsing in url-parse <1.4.3 returns wrong hostname which leads to multiple vulnerabilities such as SSRF, Open…
CVE-2019-25282 — Critical (CVSS 9.8): V-SOL GPON/EPON OLT Platform v2.03 contains an open redirect vulnerability in the script that allows attackers to…
CVE-2020-36912 — Critical (CVSS 9.8): Plexus anblick Digital Signage Management 3.1.13 contains an open redirect vulnerability in the 'PantallaLogin' script…
CVE-2025-43526 — Critical (CVSS 9.8): This issue was addressed with improved URL validation. This issue is fixed in Safari 26.2, macOS Tahoe 26.2. On a Mac…
CVE-2025-55031 — Critical (CVSS 9.8): Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. An…
CVE-2024-22891 — Critical (CVSS 9.8): Nteract v.0.28.0 was discovered to contain a remote code execution (RCE) vulnerability via the Markdown link.

Browse all CWE-601 (Open Redirect) vulnerabilities →