# CVE-2024-6521: Cross-site scripting in Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder

> Administrators can inject scripts via dropdown fields in Fluent Forms, affecting multi-site or restricted HTML installations.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Jul 2024
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-8xhf-5jm8-p7c7

## What is CVE-2024-6521?

CVE-2024-6521 is a medium-severity cross-site scripting vulnerability in techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder, published on 27 Jul 2024. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

The Contact Form Plugin by Fluent Forms for Quiz, Survey, and Drag & Drop WP Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via dropdown fields in all versions up to, and including, 5.1.19 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

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

## Which versions are affected by CVE-2024-6521?

It affects 1 product.


Products: Fluentforms Contact Form.

## How do I fix CVE-2024-6521?

No fix has been published for CVE-2024-6521 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-6521 being exploited?

There is no known exploitation of CVE-2024-6521 in the wild and no public exploit code.

## Other vulnerabilities in techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder

- [CVE-2024-2771](https://insights.sbomify.com/CVE-2024-2771/): Missing authorization in Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder (critical 9.8)
- [CVE-2022-3463](https://insights.sbomify.com/CVE-2022-3463/): FluentForm < 4.3.13 - CSV Injection (critical 9.8)
- [CVE-2021-34620](https://insights.sbomify.com/CVE-2021-34620/): CSRF in WP Fluent Forms < 3.6.67 allows stored XSS and Privilege Escalation (high 8.8)
- [CVE-2024-4157](https://insights.sbomify.com/CVE-2024-4157/): Deserialization in Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder (high 7.5)
- [CVE-2024-2782](https://insights.sbomify.com/CVE-2024-2782/): Missing authorization in Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-6521 and fix it if it is affected.

What it is: CVE-2024-6521 is a medium-severity cross-site scripting vulnerability in techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder, published on 27 Jul 2024. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-6521 in the wild and no public exploit code.

Affected product: techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder. 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-2024-6521/ (Markdown: https://insights.sbomify.com/CVE-2024-6521/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-6521
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-6521
- OSV: https://osv.dev/vulnerability/CVE-2024-6521

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From sbomify Insights: https://insights.sbomify.com/CVE-2024-6521/
Summaries are generated and may contain mistakes; the official description above is the record.