# CVE-2025-40630: Open redirection vulnerability in IceWarp Mail Server

> Attackers can redirect users to malicious domains via crafted URLs in IceWarp Mail Server, potentially facilitating phishing attacks.

- **Severity:** Medium 5.1 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 16 May 2025
- **Updated:** 16 May 2025
- **Also known as:** GHSA-hf55-g8pm-mm27

## What is CVE-2025-40630?

CVE-2025-40630 is a medium-severity vulnerability in Icewarp Mail Server, published on 16 May 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2025-40630?

It affects 1 product.


Products: Icewarp Mail Server.

## How do I fix CVE-2025-40630?

No fix has been published for CVE-2025-40630 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-40630 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-40630 exists.

Public exploit code:

- IceWarp Mail Server ≤11.4.0 - Open Redirect (nuclei): http/cves/2025/CVE-2025-40630.yaml

## Other vulnerabilities in Icewarp Mail Server

- [CVE-2023-39699](https://insights.sbomify.com/CVE-2023-39699/): Path traversal in n/a (critical 9.8)
- [CVE-2020-14066](https://insights.sbomify.com/CVE-2020-14066/): File upload in n/a (high 8.8)
- [CVE-2019-12593](https://insights.sbomify.com/CVE-2019-12593/): Path traversal in n/a (high 7.5)
- [CVE-2015-1503](https://insights.sbomify.com/CVE-2015-1503/): Path traversal in n/a (high 7.5)
- [CVE-2020-14064](https://insights.sbomify.com/CVE-2020-14064/): Missing authorization in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-40630 and fix it if it is affected.

What it is: CVE-2025-40630 is a medium-severity vulnerability in Icewarp Mail Server, published on 16 May 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-40630 exists.

Affected product: Icewarp Mail Server. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-40630/ (Markdown: https://insights.sbomify.com/CVE-2025-40630/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-40630
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-40630
- OSV: https://osv.dev/vulnerability/CVE-2025-40630

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-40630/
Summaries are generated and may contain mistakes; the official description above is the record.