# CVE-2026-82850: Masteriyo LMS < 3.4.2 - Subscriber+ Quiz Answer Key Disclosure

> Authenticated users can retrieve correct quiz answers for any course, including those they are not enrolled in, due to insufficient access controls.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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:** 24 Sep 2026
- **Updated:** 24 Sep 2026
- **Also known as:** GHSA-9g29-72xr-rc7p

## What is CVE-2026-82850?

CVE-2026-82850 is a medium-severity vulnerability in Unknown Masteriyo LMS, published on 24 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Masteriyo LMS  WordPress plugin before 3.4.2 does not restrict access to quiz answer keys, allowing any authenticated user, such as a student, to retrieve the correct answers for any quiz on the site, including quizzes in courses they are not enrolled in. The redaction that hides them is applied only to a fixed list of question types, so the answers to every other type are returned in full to anyone able to view the questions.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2026-82850?


## How do I fix CVE-2026-82850?

No fix has been published for CVE-2026-82850 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-82850 being exploited?

There is no known exploitation of CVE-2026-82850 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-82850 and fix it if it is affected.

What it is: CVE-2026-82850 is a medium-severity vulnerability in Unknown Masteriyo LMS, published on 24 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-82850 in the wild and no public exploit code.

Affected product: Unknown Masteriyo LMS. 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-2026-82850/ (Markdown: https://insights.sbomify.com/CVE-2026-82850/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-82850
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-82850
- OSV: https://osv.dev/vulnerability/CVE-2026-82850

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-82850/
Summaries are generated and may contain mistakes; the official description above is the record.