# CVE-2021-36898: WordPress Quiz And Survey Master plugin <= 7.3.4 - Auth. SQL Injection (SQLi) vulnerability

> Authenticated attackers can exploit SQL injection in the Quiz And Survey Master plugin to read or modify database contents.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:** 28 Oct 2022
- **Updated:** 28 Apr 2026
- **Also known as:** GHSA-mpmg-7xg8-32q9

## What is CVE-2021-36898?

CVE-2021-36898 is a high-severity SQL injection vulnerability in ExpressTech Quiz And Survey Master (WordPress plugin), published on 28 Oct 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Auth. SQL Injection (SQLi) vulnerability in Quiz And Survey Master plugin <= 7.3.4 on WordPress.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2021-36898?

It affects 1 product.


Products: Expresstech Quiz and Survey Master.

## How do I fix CVE-2021-36898?

No fix has been published for CVE-2021-36898 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-36898 being exploited?

There is no known exploitation of CVE-2021-36898 in the wild and no public exploit code.

## Other vulnerabilities in ExpressTech Quiz And Survey Master (WordPress plugin)

- [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-2021-36898 and fix it if it is affected.

What it is: CVE-2021-36898 is a high-severity SQL injection vulnerability in ExpressTech Quiz And Survey Master (WordPress plugin), published on 28 Oct 2022. 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-2021-36898 in the wild and no public exploit code.

Affected product: ExpressTech Quiz And Survey Master (WordPress plugin). 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-2021-36898/ (Markdown: https://insights.sbomify.com/CVE-2021-36898/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-36898
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-36898
- OSV: https://osv.dev/vulnerability/CVE-2021-36898

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-36898/
Summaries are generated and may contain mistakes; the official description above is the record.