# CVE-2026-5670: Cyber-III Student-Management-System upload.php move_uploaded_file unrestricted upload

> Remote attackers can upload arbitrary files via unrestricted upload in the student management system, potentially leading to code execution.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **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:** 6 Apr 2026
- **Updated:** 7 Apr 2026
- **Also known as:** GHSA-2x66-2279-rwjv

## What is CVE-2026-5670?

CVE-2026-5670 is a medium-severity vulnerability in Cyber-III Student-Management-System, published on 6 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in Cyber-III Student-Management-System up to 1a938fa61e9f735078e9b291d2e6215b4942af3f. This issue affects the function move_uploaded_file of the file /AssignmentSection/submission/upload.php. Performing a manipulation of the argument File results in unrestricted upload. The attack can be initiated remotely. The exploit has been made public and could be used. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-5670?


## How do I fix CVE-2026-5670?

No fix has been published for CVE-2026-5670 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5670 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5670 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5670 and fix it if it is affected.

What it is: CVE-2026-5670 is a medium-severity vulnerability in Cyber-III Student-Management-System, published on 6 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5670 exists.

Affected product: Cyber-III Student-Management-System. 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-2026-5670/ (Markdown: https://insights.sbomify.com/CVE-2026-5670/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5670
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5670
- OSV: https://osv.dev/vulnerability/CVE-2026-5670

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-5670/
Summaries are generated and may contain mistakes; the official description above is the record.