# CVE-2021-24571: HD Quiz < 1.8.4 - Authenticated Stored XSS

> Authenticated users can inject malicious scripts via quiz answers in the HD Quiz WordPress plugin, potentially leading to stored cross-site scripting attacks.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 23 Aug 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-7hqj-44cw-26jp

## What is CVE-2021-24571?

CVE-2021-24571 is a medium-severity cross-site scripting vulnerability in Unknown HD Quiz, published on 23 Aug 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The HD Quiz WordPress plugin before 1.8.4 does not escape some of its Answers before outputting them in attribute when generating the Quiz, which could lead to Stored Cross-Site Scripting issues

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-24571?

It affects 1 product.


Products: Harmonicdesign Hd Quiz.

## How do I fix CVE-2021-24571?

No fix has been published for CVE-2021-24571 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24571 being exploited?

There is no known exploitation of CVE-2021-24571 in the wild and no public exploit code.

## Other vulnerabilities in Unknown HD Quiz

- [CVE-2024-22161](https://insights.sbomify.com/CVE-2024-22161/): WordPress HD Quiz Plugin <= 1.8.11 is vulnerable to Cross Site Scripting (XSS) (medium 5.9)
- [CVE-2024-13383](https://insights.sbomify.com/CVE-2024-13383/): HD Quiz < 2.0.0 - Editor+ Stored XSS (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24571 and fix it if it is affected.

What it is: CVE-2021-24571 is a medium-severity cross-site scripting vulnerability in Unknown HD Quiz, published on 23 Aug 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-24571 in the wild and no public exploit code.

Affected product: Unknown HD Quiz. 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-2021-24571/ (Markdown: https://insights.sbomify.com/CVE-2021-24571/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24571
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24571
- OSV: https://osv.dev/vulnerability/CVE-2021-24571

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24571/
Summaries are generated and may contain mistakes; the official description above is the record.