# CVE-2021-24513: Form Builder < 1.9.8.4 - Authenticated Stored Cross-Site Scripting

> Authenticated admins can inject malicious scripts into Form Builder titles, enabling stored XSS attacks against other users.

- **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:** 6 Sep 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-4c89-7wj7-fm5r

## What is CVE-2021-24513?

CVE-2021-24513 is a medium-severity cross-site scripting vulnerability in Unknown Form Builder | Create Responsive Contact Forms, published on 6 Sep 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 Form Builder | Create Responsive Contact Forms WordPress plugin before 1.9.8.4 does not sanitise or escape its Form Title, allowing high privilege users such as admin to set Cross-Site Scripting payload in them, even when the unfiltered_html capability is disallowed

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

## Which versions are affected by CVE-2021-24513?

It affects 1 product.


Products: Web-Settler Form Builder.

## How do I fix CVE-2021-24513?

No fix has been published for CVE-2021-24513 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24513 being exploited?

There is no known exploitation of CVE-2021-24513 in the wild and no public exploit code.

## Other vulnerabilities in Unknown Form Builder | Create Responsive Contact Forms

- [CVE-2023-23795](https://insights.sbomify.com/CVE-2023-23795/): WordPress Form Builder Plugin <= 1.9.9.0 is vulnerable to Cross Site Request Forgery (CSRF) (high 7.1)
- [CVE-2023-23796](https://insights.sbomify.com/CVE-2023-23796/): WordPress Form Builder Plugin <= 1.9.9.0 is vulnerable to CSV Injection (medium 4.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24513 and fix it if it is affected.

What it is: CVE-2021-24513 is a medium-severity cross-site scripting vulnerability in Unknown Form Builder | Create Responsive Contact Forms, published on 6 Sep 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-2021-24513 in the wild and no public exploit code.

Affected product: Unknown Form Builder | Create Responsive Contact Forms. 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-2021-24513/ (Markdown: https://insights.sbomify.com/CVE-2021-24513/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24513
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24513
- OSV: https://osv.dev/vulnerability/CVE-2021-24513

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24513/
Summaries are generated and may contain mistakes; the official description above is the record.