# CVE-2026-30880: baserCMS: OS command injection vulnerability in installer


- **Severity:** Critical 9.2 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Fix available:** Yes
- **Published:** 31 Mar 2026
- **Updated:** 31 Mar 2026
- **Also known as:** GHSA-6hpg-8rx3-cwgv

## What is CVE-2026-30880?

CVE-2026-30880 is a critical vulnerability in Basercms Basercms, published on 31 Mar 2026. 

### Official description

baserCMS is a website development framework. Prior to version 5.2.3, baserCMS has an OS command injection vulnerability in the installer. This issue has been patched in version 5.2.3.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-30880?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `baserproject/basercms` | Packagist | All versions | 5.2.3 |
| `baserproject/basercms` | Packagist | All versions | 5.2.3 |

Products: Basercms Basercms.

## How do I fix CVE-2026-30880?

Upgrade baserproject/basercms to 5.2.3 or later.

## Is CVE-2026-30880 being exploited?

There is no known exploitation of CVE-2026-30880 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-2026-21861](https://insights.sbomify.com/CVE-2026-21861/): baserCMS: OS Command Injection Leading to Remote Code Execution (RCE) (critical 9.1)
- [CVE-2026-30877](https://insights.sbomify.com/CVE-2026-30877/): baserCMS: OS Command Injection in the baserCMS Update Functionality (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-30880 and fix it if it is affected.

What it is: CVE-2026-30880 is a critical vulnerability in Basercms Basercms, published on 31 Mar 2026. 
Exploitation: There is no known exploitation of CVE-2026-30880 in the wild and no public exploit code.

Affected packages and fixed versions:
- baserproject/basercms (Packagist): affected all versions; fixed in 5.2.3
- baserproject/basercms (Packagist): affected all versions; fixed in 5.2.3

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-2026-30880/ (Markdown: https://insights.sbomify.com/CVE-2026-30880/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-30880
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-30880
- OSV: https://osv.dev/vulnerability/CVE-2026-30880

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-30880/
Summaries are generated and may contain mistakes; the official description above is the record.