# CVE-2020-15277: Remote Code Execution in baserCMS

> An authenticated administrator can upload executable scripts to achieve remote code execution in baserCMS.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 30 Oct 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-6fmv-q269-55cw

## What is CVE-2020-15277?

CVE-2020-15277 is a high-severity vulnerability in Basercms Basercms, published on 30 Oct 2020. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

baserCMS before version 4.4.1 is affected by Remote Code Execution (RCE). Code may be executed by logging in as a system administrator and uploading an executable script file such as a PHP file. The Edit template component is vulnerable. The issue is fixed in version 4.4.1.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2020-15277?

2 open source packages ship an affected version, including baserproject/basercms. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `baserproject/basercms` | Packagist | From 4.4.0 | 4.4.1 |
| `baserproject/basercms` | Packagist | From 4.4.0 | 4.4.1 |

Products: Basercms Basercms.

## How do I fix CVE-2020-15277?

Upgrade baserproject/basercms to 4.4.1 or later.

## Is CVE-2020-15277 being exploited?

There is no known exploitation of CVE-2020-15277 in the wild and no public exploit code.

## Other vulnerabilities in Basercms Basercms

- [CVE-2023-25654](https://insights.sbomify.com/CVE-2023-25654/): baserCMS File Uploader Remote Code Execution (RCE) vulnerability (critical 9.8)
- [CVE-2023-25655](https://insights.sbomify.com/CVE-2023-25655/): baserCMS allows any file to be uploaded (critical 9.8)
- [CVE-2017-10842](https://insights.sbomify.com/CVE-2017-10842/): baserCMS SQL Injection vulnerability (critical 9.8)
- [CVE-2026-30880](https://insights.sbomify.com/CVE-2026-30880/): baserCMS: OS command injection vulnerability in installer (critical 9.2)
- [CVE-2026-21861](https://insights.sbomify.com/CVE-2026-21861/): baserCMS: OS Command Injection Leading to Remote Code Execution (RCE) (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-15277 and fix it if it is affected.

What it is: CVE-2020-15277 is a high-severity vulnerability in Basercms Basercms, published on 30 Oct 2020. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-15277 in the wild and no public exploit code.

Affected packages and fixed versions:
- baserproject/basercms (Packagist): affected from 4.4.0; fixed in 4.4.1
- baserproject/basercms (Packagist): affected from 4.4.0; fixed in 4.4.1

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-2020-15277/ (Markdown: https://insights.sbomify.com/CVE-2020-15277/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-15277
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-15277
- OSV: https://osv.dev/vulnerability/CVE-2020-15277

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-15277/
Summaries are generated and may contain mistakes; the official description above is the record.