# CVE-2021-24412: Html5 Audio Player < 2.1.3 - Contributor+ Stored Cross-Site Scripting

> Contributors can inject malicious scripts via shortcode parameters in the Html5 Audio Player WordPress plugin, leading to stored XSS 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:** 18 Oct 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-cq83-pmg7-mjwj

## What is CVE-2021-24412?

CVE-2021-24412 is a medium-severity cross-site scripting vulnerability in Unknown Html5 Audio Player – Audio Player for WordPress, published on 18 Oct 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 Html5 Audio Player – Audio Player for WordPress plugin before 2.1.3 does not sanitise or validate the parameters from its shortcode, allowing users with a role as low as contributor to set Cross-Site Scripting payload in them which will be triggered in the page/s with the embed malicious shortcode

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

## Which versions are affected by CVE-2021-24412?

It affects 1 product.


Products: Bplugins Html5 Audio Player.

## How do I fix CVE-2021-24412?

No fix has been published for CVE-2021-24412 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24412 being exploited?

There is no known exploitation of CVE-2021-24412 in the wild and no public exploit code.

## Other vulnerabilities in Unknown Html5 Audio Player – Audio Player for WordPress

- [CVE-2024-37445](https://insights.sbomify.com/CVE-2024-37445/): WordPress HTML5 Audio Player plugin <= 2.2.23 - Cross Site Scripting (XSS) vulnerability (medium 6.5)
- [CVE-2023-0170](https://insights.sbomify.com/CVE-2023-0170/): Html5 Audio Player < 2.1.12 - Contributor+ Stored XSS (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24412 and fix it if it is affected.

What it is: CVE-2021-24412 is a medium-severity cross-site scripting vulnerability in Unknown Html5 Audio Player – Audio Player for WordPress, published on 18 Oct 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-2021-24412 in the wild and no public exploit code.

Affected product: Unknown Html5 Audio Player – Audio Player 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-2021-24412/ (Markdown: https://insights.sbomify.com/CVE-2021-24412/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24412
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24412
- OSV: https://osv.dev/vulnerability/CVE-2021-24412

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24412/
Summaries are generated and may contain mistakes; the official description above is the record.