# CVE-2016-4834: Missing authorization in n/a

> Authenticated users can create or modify user accounts due to improper access restrictions in the save action.

- **Severity:** High 8.1 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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:** 1 Aug 2016
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-hfx2-2fjg-87qf

## What is CVE-2016-4834?

CVE-2016-4834 is a high-severity missing authorization vulnerability in Vtiger Vtiger Crm, published on 1 Aug 2016. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

modules/Users/actions/Save.php in Vtiger CRM 6.4.0 and earlier does not properly restrict user-save actions, which allows remote authenticated users to create or modify user accounts via unspecified vectors.

Weakness: CWE-264

## Which versions are affected by CVE-2016-4834?

It affects 1 product.


Products: Vtiger Vtiger Crm.

## How do I fix CVE-2016-4834?

No fix has been published for CVE-2016-4834 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-4834 being exploited?

There is no known exploitation of CVE-2016-4834 in the wild and no public exploit code.

## Other vulnerabilities in Vtiger Vtiger Crm

- [CVE-2020-22807](https://insights.sbomify.com/CVE-2020-22807/): SQL injection in n/a (critical 9.8)
- [CVE-2013-3215](https://insights.sbomify.com/CVE-2013-3215/): Auth bypass in n/a (critical 9.8)
- [CVE-2013-3214](https://insights.sbomify.com/CVE-2013-3214/): Code injection in n/a (critical 9.8)
- [CVE-2009-3250](https://insights.sbomify.com/CVE-2009-3250/): File upload in n/a (critical 9.0)
- [CVE-2009-3258](https://insights.sbomify.com/CVE-2009-3258/): Missing authorization in n/a (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-4834 and fix it if it is affected.

What it is: CVE-2016-4834 is a high-severity missing authorization vulnerability in Vtiger Vtiger Crm, published on 1 Aug 2016. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2016-4834 in the wild and no public exploit code.

Affected product: Vtiger Vtiger Crm. 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-2016-4834/ (Markdown: https://insights.sbomify.com/CVE-2016-4834/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-4834
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-4834
- OSV: https://osv.dev/vulnerability/CVE-2016-4834

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-4834/
Summaries are generated and may contain mistakes; the official description above is the record.