# CVE-2018-3815: Missing authorization in n/a

> An authenticated attacker can spoof email senders by manipulating XIMSS protocol elements, bypassing sender validation in CommuniGate Pro.

- **Severity:** Medium 5.7 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 8 Jan 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-hxgx-wfcx-qv3g

## What is CVE-2018-3815?

CVE-2018-3815 is a medium-severity missing authorization vulnerability in n/a, published on 8 Jan 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The "XML Interface to Messaging, Scheduling, and Signaling" (XIMSS) protocol implementation in CommuniGate Pro (CGP) 6.2 suffers from a Missing XIMSS Protocol Validation attack that leads to an email spoofing attack, allowing a malicious authenticated attacker to send a message from any source email address. The attack uses an HTTP POST request to a /Session URI, and interchanges the XML From and To elements.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2018-3815?

It affects 1 product.


Products: Stalker Communigate Pro.

## How do I fix CVE-2018-3815?

No fix has been published for CVE-2018-3815 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-3815 being exploited?

There is no known exploitation of CVE-2018-3815 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2006-0468](https://insights.sbomify.com/CVE-2006-0468/): Integer overflow in n/a (high 7.5)
- [CVE-2003-1481](https://insights.sbomify.com/CVE-2003-1481/): Information disclosure in n/a (medium 5.8)
- [CVE-2002-2375](https://insights.sbomify.com/CVE-2002-2375/): Path traversal in n/a (medium 5.0)
- [CVE-2005-1007](https://insights.sbomify.com/CVE-2005-1007/): Denial of service in n/a (medium 5.0)
- [CVE-2000-1002](https://insights.sbomify.com/CVE-2000-1002/): Information disclosure in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-3815 and fix it if it is affected.

What it is: CVE-2018-3815 is a medium-severity missing authorization vulnerability in n/a, published on 8 Jan 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-3815 in the wild and no public exploit code.

Affected product: n/a. 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-2018-3815/ (Markdown: https://insights.sbomify.com/CVE-2018-3815/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-3815
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-3815
- OSV: https://osv.dev/vulnerability/CVE-2018-3815

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-3815/
Summaries are generated and may contain mistakes; the official description above is the record.