# CVE-2020-26048: File upload in n/a

> Authenticated attackers can upload malicious files and rename them to PHP via the file manager, leading to remote arbitrary code execution.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Oct 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-vg5c-7m9h-9pr2

## What is CVE-2020-26048?

CVE-2020-26048 is a high-severity vulnerability in n/a, published on 5 Oct 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The file manager option in CuppaCMS before 2019-11-12 allows an authenticated attacker to upload a malicious file within an image extension and through a custom request using the rename function provided by the file manager is able to modify the image extension into PHP resulting in remote arbitrary code execution.

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

## Which versions are affected by CVE-2020-26048?

It affects 1 product.


Products: Cuppacms Cuppacms.

## How do I fix CVE-2020-26048?

No fix has been published for CVE-2020-26048 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-26048 being exploited?

There is no known exploitation of CVE-2020-26048 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2023-47990](https://insights.sbomify.com/CVE-2023-47990/): SQL injection in n/a (critical 9.8)
- [CVE-2023-39681](https://insights.sbomify.com/CVE-2023-39681/): Code injection in n/a (critical 9.8)
- [CVE-2022-38296](https://insights.sbomify.com/CVE-2022-38296/): File upload in n/a (critical 9.8)
- [CVE-2022-27984](https://insights.sbomify.com/CVE-2022-27984/): SQL injection in n/a (critical 9.8)
- [CVE-2022-27985](https://insights.sbomify.com/CVE-2022-27985/): SQL injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-26048 and fix it if it is affected.

What it is: CVE-2020-26048 is a high-severity vulnerability in n/a, published on 5 Oct 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-26048 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-2020-26048/ (Markdown: https://insights.sbomify.com/CVE-2020-26048/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-26048
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-26048
- OSV: https://osv.dev/vulnerability/CVE-2020-26048

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-26048/
Summaries are generated and may contain mistakes; the official description above is the record.