# CVE-2024-3521: Byzoro Smart S80 Management Platform userattestation.php unrestricted upload

> Attackers can upload malicious files via the web_img parameter in userattestation.php, potentially leading to remote code execution.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Apr 2024
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-phxq-f9jh-xw45

## What is CVE-2024-3521?

CVE-2024-3521 is a medium-severity vulnerability in Byzoro Smart S80 Management Platform, published on 9 Apr 2024. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability was found in Byzoro Smart S80 Management Platform up to 20240317. It has been rated as critical. Affected by this issue is some unknown functionality of the file /useratte/userattestation.php. The manipulation of the argument web_img leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-259892. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

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

## Which versions are affected by CVE-2024-3521?


## How do I fix CVE-2024-3521?

No fix has been published for CVE-2024-3521 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-3521 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-3521 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-3521 and fix it if it is affected.

What it is: CVE-2024-3521 is a medium-severity vulnerability in Byzoro Smart S80 Management Platform, published on 9 Apr 2024. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-3521 exists.

Affected product: Byzoro Smart S80 Management Platform. 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-2024-3521/ (Markdown: https://insights.sbomify.com/CVE-2024-3521/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-3521
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-3521
- OSV: https://osv.dev/vulnerability/CVE-2024-3521

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-3521/
Summaries are generated and may contain mistakes; the official description above is the record.