# CVE-2021-45461: Code injection in n/a

> Remote attackers can execute arbitrary code in FreePBX via the Rest Phone Apps module, requiring an upgrade to patched versions.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Dec 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-pph6-2c9x-fm9c

## What is CVE-2021-45461?

CVE-2021-45461 is a critical code injection vulnerability in n/a, published on 22 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

FreePBX, when restapps (aka Rest Phone Apps) 15.0.19.87, 15.0.19.88, 16.0.18.40, or 16.0.18.41 is installed, allows remote attackers to execute arbitrary code, as exploited in the wild in December 2021. The fixed versions are 15.0.20 and 16.0.19.

## Which versions are affected by CVE-2021-45461?

It affects 1 product.


Products: Sangoma Restapps.

## How do I fix CVE-2021-45461?

No fix has been published for CVE-2021-45461 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-45461 being exploited?

There is no known exploitation of CVE-2021-45461 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-10666](https://insights.sbomify.com/CVE-2020-10666/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45461 and fix it if it is affected.

What it is: CVE-2021-45461 is a critical code injection vulnerability in n/a, published on 22 Dec 2021. 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-2021-45461 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-2021-45461/ (Markdown: https://insights.sbomify.com/CVE-2021-45461/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45461
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45461
- OSV: https://osv.dev/vulnerability/CVE-2021-45461

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-45461/
Summaries are generated and may contain mistakes; the official description above is the record.