# CVE-2021-24221: Quiz And Survey Master < 7.1.12 - Authenticated SQL injection via shortcode

> Authenticated users or unauthenticated visitors can exploit SQL injection via the result_id parameter in the qsm_result shortcode to access or modify database contents.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 12 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-mm94-4mf6-6w8g

## What is CVE-2021-24221?

CVE-2021-24221 is a high-severity SQL injection vulnerability in Unknown Quiz And Survey Master – Best Quiz, Exam and Survey Plugin for WordPress, published on 12 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Quiz And Survey Master – Best Quiz, Exam and Survey Plugin for WordPress plugin before 7.1.12 did not sanitise the result_id GET parameter on pages with the [qsm_result] shortcode without id attribute, concatenating it in a SQL statement and leading to an SQL injection. The lowest role allowed to use this shortcode in post or pages being author, such user could gain unauthorised access to the DBMS. If the shortcode (without the id attribute) is embed on a public page or post, then unauthenticated users could exploit the injection.

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

## Which versions are affected by CVE-2021-24221?

It affects 1 product.


Products: Expresstech Quiz and Survey Master.

## How do I fix CVE-2021-24221?

No fix has been published for CVE-2021-24221 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24221 being exploited?

There is no known exploitation of CVE-2021-24221 in the wild and no public exploit code.

## Other vulnerabilities in Unknown Quiz And Survey Master – Best Quiz, Exam and Survey Plugin for WordPress

- [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-2021-24221 and fix it if it is affected.

What it is: CVE-2021-24221 is a high-severity SQL injection vulnerability in Unknown Quiz And Survey Master – Best Quiz, Exam and Survey Plugin for WordPress, published on 12 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-24221 in the wild and no public exploit code.

Affected product: Unknown Quiz And Survey Master – Best Quiz, Exam and Survey Plugin for WordPress. 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-2021-24221/ (Markdown: https://insights.sbomify.com/CVE-2021-24221/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24221
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24221
- OSV: https://osv.dev/vulnerability/CVE-2021-24221

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-24221/
Summaries are generated and may contain mistakes; the official description above is the record.