# CVE-2025-41083: Improper Neutralization in Altitude Communication Server

> Attackers can manipulate Host headers to redirect users to malicious sites, potentially stealing login credentials from Altitude Communication Server users.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/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:** 26 Jan 2026
- **Updated:** 26 Jan 2026
- **Also known as:** GHSA-2hff-rr39-hph8

## What is CVE-2025-41083?

CVE-2025-41083 is a medium-severity vulnerability in Altitude Communication Server, published on 26 Jan 2026. 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

Vulnerability in Altitude Authentication Service and Altitude Communication Server v8.5.3290.0 by Altitude, where manipulation of Host header in HTTP requests allows redirection to an arbitrary URL or modification of the base URL to trick the victim into sending login credentials to a malicious website. This behavior can be used to redirect clients to endpoints controlled by the attacker.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2025-41083?


## How do I fix CVE-2025-41083?

No fix has been published for CVE-2025-41083 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-41083 being exploited?

There is no known exploitation of CVE-2025-41083 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-41083 and fix it if it is affected.

What it is: CVE-2025-41083 is a medium-severity vulnerability in Altitude Communication Server, published on 26 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-41083 in the wild and no public exploit code.

Affected product: Altitude Communication 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-2025-41083/ (Markdown: https://insights.sbomify.com/CVE-2025-41083/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-41083
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-41083
- OSV: https://osv.dev/vulnerability/CVE-2025-41083

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-41083/
Summaries are generated and may contain mistakes; the official description above is the record.