# CVE-2015-3419: Missing authorization in n/a

> Authenticated attackers can bypass authorization checks to inject private messages into conversations in vBulletin.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 19 Sep 2017
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-vqmw-3gq4-45pv

## What is CVE-2015-3419?

CVE-2015-3419 is a medium-severity missing authorization vulnerability in Vbulletin Vbulletin, published on 19 Sep 2017. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

vBulletin 5.x through 5.1.6 allows remote authenticated users to bypass authorization checks and inject private messages into conversations via vectors related to an input validation failure.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2015-3419?

It affects 1 product.


Products: Vbulletin Vbulletin.

## How do I fix CVE-2015-3419?

No fix has been published for CVE-2015-3419 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-3419 being exploited?

There is no known exploitation of CVE-2015-3419 in the wild and no public exploit code.

## Other vulnerabilities in Vbulletin Vbulletin

- [CVE-2020-17496](https://insights.sbomify.com/CVE-2020-17496/): vBulletin PHP Module Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16759](https://insights.sbomify.com/CVE-2019-16759/): vBulletin PHP Module Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2025-48827](https://insights.sbomify.com/CVE-2025-48827/): vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to invoke protected API controllers' methods when running (critical 10.0)
- [CVE-2023-25135](https://insights.sbomify.com/CVE-2023-25135/): Deserialization in n/a (critical 9.8)
- [CVE-2020-7373](https://insights.sbomify.com/CVE-2020-7373/): Code injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-3419 and fix it if it is affected.

What it is: CVE-2015-3419 is a medium-severity missing authorization vulnerability in Vbulletin Vbulletin, published on 19 Sep 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2015-3419 in the wild and no public exploit code.

Affected product: Vbulletin Vbulletin. 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-2015-3419/ (Markdown: https://insights.sbomify.com/CVE-2015-3419/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-3419
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-3419
- OSV: https://osv.dev/vulnerability/CVE-2015-3419

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-3419/
Summaries are generated and may contain mistakes; the official description above is the record.