# CVE-2009-4109: Information disclosure in n/a

> Remote attackers can access sensitive version information via the install wizard without authentication, exposing DotNetNuke CMS instances to reconnaissance.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:P/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Nov 2009
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-vc99-gqjv-x726

## What is CVE-2009-4109?

CVE-2009-4109 is a medium-severity vulnerability in Dnnsoftware Dotnetnuke, published on 28 Nov 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The install wizard in DotNetNuke 4.0 through 5.1.4 does not prevent anonymous users from accessing functionality related to determination of the need for an upgrade, which allows remote attackers to access version information and possibly other sensitive information.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2009-4109?

It affects 1 product.


Products: Dnnsoftware Dotnetnuke.

## How do I fix CVE-2009-4109?

No fix has been published for CVE-2009-4109 yet. Limit exposure of the affected software until one is available.

## Is CVE-2009-4109 being exploited?

There is no known exploitation of CVE-2009-4109 in the wild and no public exploit code.

## Other vulnerabilities in Dnnsoftware Dotnetnuke

- [CVE-2017-9822](https://insights.sbomify.com/CVE-2017-9822/): DotNetNuke (DNN) Remote Code Execution (high 8.8, exploited in the wild)
- [CVE-2018-15811](https://insights.sbomify.com/CVE-2018-15811/): DotNetNuke (DNN) Inadequate Encryption Strength (high 7.5, exploited in the wild)
- [CVE-2018-18325](https://insights.sbomify.com/CVE-2018-18325/): DotNetNuke (DNN) Inadequate Encryption Strength (high 7.5, exploited in the wild)
- [CVE-2025-64095](https://insights.sbomify.com/CVE-2025-64095/): DNN Insufficient Access Control - Image Upload allows for Site Content Overwrite (critical 10.0)
- [CVE-2006-3601](https://insights.sbomify.com/CVE-2006-3601/): Privilege escalation in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-4109 and fix it if it is affected.

What it is: CVE-2009-4109 is a medium-severity vulnerability in Dnnsoftware Dotnetnuke, published on 28 Nov 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2009-4109 in the wild and no public exploit code.

Affected product: Dnnsoftware Dotnetnuke. 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-2009-4109/ (Markdown: https://insights.sbomify.com/CVE-2009-4109/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-4109
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-4109
- OSV: https://osv.dev/vulnerability/CVE-2009-4109

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-4109/
Summaries are generated and may contain mistakes; the official description above is the record.