# CVE-2018-16763: Code injection in n/a

> Attackers can execute arbitrary PHP code via unauthenticated input parameters in FUEL CMS, leading to full system compromise.

- **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:** 9 Sep 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-rq3x-g9v8-6qjm

## What is CVE-2018-16763?

CVE-2018-16763 is a critical code injection vulnerability in n/a, published on 9 Sep 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

FUEL CMS 1.4.1 allows PHP Code Evaluation via the pages/select/ filter parameter or the preview/ data parameter. This can lead to Pre-Auth Remote Code Execution.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2018-16763?

It affects 1 product.


Products: Thedaylightstudio Fuel Cms.

## How do I fix CVE-2018-16763?

No fix has been published for CVE-2018-16763 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-16763 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-16763 exists.

Public exploit code:

- Exploit to trigger RCE for CVE-2018-16763 on FuelCMS <= 1.4.1 and interactive shell.  (github_poc): https://github.com/p0dalirius/CVE-2018-16763-FuelCMS-1.4.1-RCE
- Fuel CMS 1.4.1 - Remote Code Execution (github_poc): https://github.com/padsalatushal/CVE-2018-16763
- Fuel CMS 1.4.1 - Remote Code Execution (github_poc): https://github.com/altsun/CVE-2018-16763-FuelCMS-1.4.1-RCE
- https://github.com/n3m1sys/CVE-2018-16763-Exploit-Python3 (github_poc): https://github.com/n3m1sys/CVE-2018-16763-Exploit-Python3
- A working PoC to CVE-2018-16763  (github_poc): https://github.com/shoamshilo/Fuel-CMS-Remote-Code-Execution-1.4--RCE--
- This is an updated version of the CVE-2018-16763 for fuelCMS 1.4.1 (github_poc): https://github.com/hikarihacks/CVE-2018-16763-exploit

## Other vulnerabilities in n/a

- [CVE-2020-17463](https://insights.sbomify.com/CVE-2020-17463/): Fuel CMS SQL Injection (critical 9.8, exploited in the wild)
- [CVE-2020-22151](https://insights.sbomify.com/CVE-2020-22151/): File upload in n/a (critical 9.8)
- [CVE-2020-22153](https://insights.sbomify.com/CVE-2020-22153/): File upload in n/a (critical 9.8)
- [CVE-2021-38727](https://insights.sbomify.com/CVE-2021-38727/): SQL injection in n/a (critical 9.8)
- [CVE-2020-24791](https://insights.sbomify.com/CVE-2020-24791/): SQL injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-16763 and fix it if it is affected.

What it is: CVE-2018-16763 is a critical code injection vulnerability in n/a, published on 9 Sep 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-16763 exists.

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-2018-16763/ (Markdown: https://insights.sbomify.com/CVE-2018-16763/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-16763
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-16763
- OSV: https://osv.dev/vulnerability/CVE-2018-16763

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-16763/
Summaries are generated and may contain mistakes; the official description above is the record.