# CVE-2019-19902: File upload in n/a

> An attacker with admin permissions can upload malicious scripts via configuration archives, potentially leading to remote code execution if other scripting languages are enabled.

- **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:** No
- **Published:** 19 Dec 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-h8jv-w343-48r6

## What is CVE-2019-19902?

CVE-2019-19902 is a high-severity vulnerability in n/a, published on 19 Dec 2019. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

An issue was discovered in Backdrop CMS 1.13.x before 1.13.5 and 1.14.x before 1.14.2. It allows the upload of entire-site configuration archives through the user interface or command line. It does not sufficiently check uploaded archives for invalid data, allowing non-configuration scripts to potentially be uploaded to the server. This issue is mitigated by the fact that the attacker would be required to have the "Synchronize, import, and export configuration" permission, a permission that only trusted administrators should be given. Other measures in the product prevent the execution of PHP scripts, so another server-side scripting language must be accessible on the server to execute code.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2019-19902?

It affects 1 product.


Products: Backdropcms Backdrop Cms.

## How do I fix CVE-2019-19902?

No fix has been published for CVE-2019-19902 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-19902 being exploited?

There is no known exploitation of CVE-2019-19902 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-14771](https://insights.sbomify.com/CVE-2019-14771/): File upload in n/a (critical 9.8)
- [CVE-2022-42092](https://insights.sbomify.com/CVE-2022-42092/): Backdrop CMS Unrestricted File Upload vulnerability (high 7.2)
- [CVE-2025-63828](https://insights.sbomify.com/CVE-2025-63828/): Backdrop CMS Host Header Injection vulnerability (medium 6.1)
- [CVE-2025-44141](https://insights.sbomify.com/CVE-2025-44141/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2024-54123](https://insights.sbomify.com/CVE-2024-54123/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-19902 and fix it if it is affected.

What it is: CVE-2019-19902 is a high-severity vulnerability in n/a, published on 19 Dec 2019. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-19902 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-2019-19902/ (Markdown: https://insights.sbomify.com/CVE-2019-19902/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-19902
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-19902
- OSV: https://osv.dev/vulnerability/CVE-2019-19902

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-19902/
Summaries are generated and may contain mistakes; the official description above is the record.