# CVE-2025-6639: Missing authorization in Tutor LMS Pro

> Authenticated attackers can view and edit other students' assignment submissions due to missing authorization checks in Tutor LMS Pro.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N`)
- **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:** 25 Oct 2025
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-6qx8-8q59-x2rm

## What is CVE-2025-6639?

CVE-2025-6639 is a medium-severity missing authorization vulnerability in themeum Tutor LMS Pro, published on 25 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Tutor LMS Pro – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.8.3 due to missing validation on a user controlled key when viewing and editing assignments through the tutor_assignment_submit() function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to view and edit assignment submissions of other students.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2025-6639?


## How do I fix CVE-2025-6639?

No fix has been published for CVE-2025-6639 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-6639 being exploited?

There is no known exploitation of CVE-2025-6639 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-6639 and fix it if it is affected.

What it is: CVE-2025-6639 is a medium-severity missing authorization vulnerability in themeum Tutor LMS Pro, published on 25 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-6639 in the wild and no public exploit code.

Affected product: themeum Tutor LMS Pro. 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-2025-6639/ (Markdown: https://insights.sbomify.com/CVE-2025-6639/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-6639
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-6639
- OSV: https://osv.dev/vulnerability/CVE-2025-6639

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-6639/
Summaries are generated and may contain mistakes; the official description above is the record.