# CVE-2023-43336: Missing authorization in n/a

> Attackers can bypass access controls in FreePBX CDR module by modifying parameters to view unauthorized call records.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 2 Nov 2023
- **Updated:** 9 Jul 2026
- **Also known as:** GHSA-3g8h-47mp-4839

## What is CVE-2023-43336?

CVE-2023-43336 is a high-severity missing authorization vulnerability in Sangoma Freepbx, published on 2 Nov 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Sangoma Technologies FreePBX before cdr 15.0.18, 16.0.40, 15.0.16, and 16.0.17 was discovered to contain an access control issue via a modified parameter value, e.g., changing extension=self to extension=101.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2023-43336?

It affects 1 product.


Products: Sangoma Freepbx.

## How do I fix CVE-2023-43336?

No fix has been published for CVE-2023-43336 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-43336 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-43336 exists.

## Other vulnerabilities in Sangoma Freepbx

- [CVE-2025-57819](https://insights.sbomify.com/CVE-2025-57819/): Sangoma FreePBX Authentication Bypass (critical 10.0, exploited in the wild)
- [CVE-2019-19006](https://insights.sbomify.com/CVE-2019-19006/): Sangoma FreePBX Improper Authentication (critical 9.8, exploited in the wild)
- [CVE-2026-73663](https://insights.sbomify.com/CVE-2026-73663/): FreePBX: Unauthenticated SQL injection in FreePBX missedcall via inbound Caller ID name leads to administrator takeover (critical 9.3)
- [CVE-2026-73665](https://insights.sbomify.com/CVE-2026-73665/): FreePBX UCP: Unauthenticated remote code execution via socket.io namespace auth bypass and AMI action injection (critical 9.3)
- [CVE-2026-46376](https://insights.sbomify.com/CVE-2026-46376/): FreePBX: Unauthenticated Use of Hard-Coded Credentials Vulnerability in FreePBX UCP Interface (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-43336 and fix it if it is affected.

What it is: CVE-2023-43336 is a high-severity missing authorization vulnerability in Sangoma Freepbx, published on 2 Nov 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-43336 exists.

Affected product: Sangoma Freepbx. 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-2023-43336/ (Markdown: https://insights.sbomify.com/CVE-2023-43336/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-43336
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-43336
- OSV: https://osv.dev/vulnerability/CVE-2023-43336

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-43336/
Summaries are generated and may contain mistakes; the official description above is the record.