# CVE-2023-51507: WordPress Quiz And Survey Master plugin <= 8.1.16 - Broken Access Control vulnerability

> Attackers can bypass authorization checks in the Quiz And Survey Master plugin to access restricted functionality without proper permissions.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Jun 2024
- **Updated:** 28 Apr 2026
- **Also known as:** GHSA-xr7x-6c7p-2fw4

## What is CVE-2023-51507?

CVE-2023-51507 is a medium-severity missing authorization vulnerability in ExpressTech Quiz And Survey Master, published on 14 Jun 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Missing Authorization vulnerability in ExpressTech Quiz And Survey Master.This issue affects Quiz And Survey Master: from n/a through 8.1.16.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2023-51507?

It affects 1 product.


Products: Expresstech Quiz and Survey Master.

## How do I fix CVE-2023-51507?

No fix has been published for CVE-2023-51507 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-51507 being exploited?

There is no known exploitation of CVE-2023-51507 in the wild and no public exploit code.

## Other vulnerabilities in ExpressTech Quiz And Survey Master

- [CVE-2020-35949](https://insights.sbomify.com/CVE-2020-35949/): File upload in n/a (critical 10.0)
- [CVE-2024-3592](https://insights.sbomify.com/CVE-2024-3592/): SQL injection in Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker (critical 9.9)
- [CVE-2020-35951](https://insights.sbomify.com/CVE-2020-35951/): Missing authorization in n/a (critical 9.9)
- [CVE-2024-5606](https://insights.sbomify.com/CVE-2024-5606/): Quiz And Survey Master < 9.0.2 - Contributor+ SQLi (high 8.8)
- [CVE-2022-0180](https://insights.sbomify.com/CVE-2022-0180/): Cross-site request forgery in Quiz And Survey Master (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-51507 and fix it if it is affected.

What it is: CVE-2023-51507 is a medium-severity missing authorization vulnerability in ExpressTech Quiz And Survey Master, published on 14 Jun 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-51507 in the wild and no public exploit code.

Affected product: ExpressTech Quiz And Survey Master. 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-2023-51507/ (Markdown: https://insights.sbomify.com/CVE-2023-51507/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-51507
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-51507
- OSV: https://osv.dev/vulnerability/CVE-2023-51507

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-51507/
Summaries are generated and may contain mistakes; the official description above is the record.