# CVE-2021-24208: WP Page Builder < 1.2.4 - Multiple Stored Cross-Site scripting (XSS)

> Lower-privileged users can inject malicious JavaScript into pages via unfiltered HTML widgets, potentially leading to code execution or account takeover.

- **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:** 5 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-pf43-g47c-f3f8

## What is CVE-2021-24208?

CVE-2021-24208 is a medium-severity cross-site scripting vulnerability in Unknown WP Page Builder, published on 5 Apr 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 editor of the WP Page Builder WordPress plugin before 1.2.4 allows lower-privileged users to insert unfiltered HTML, including JavaScript, into pages via the “Raw HTML” widget and the “Custom HTML” widgets (though the custom HTML widget requires sending a crafted request - it appears that this widget uses some form of client side validation but not server side validation), all of which are added via the “page_builder_data” parameter when performing the “wppb_page_save” AJAX action. It is also possible to insert malicious JavaScript via the “wppb_page_css” parameter (this can be done by closing out the style tag and opening a script tag) when performing the “wppb_page_save” AJAX action.

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

## Which versions are affected by CVE-2021-24208?

It affects 1 product.


Products: Themeum Wp Page Builder.

## How do I fix CVE-2021-24208?

No fix has been published for CVE-2021-24208 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24208 being exploited?

There is no known exploitation of CVE-2021-24208 in the wild and no public exploit code.

## Other vulnerabilities in Unknown WP Page Builder

- [CVE-2022-3830](https://insights.sbomify.com/CVE-2022-3830/): WP Page Builder <= 1.2.8 - Admin+ Stored Cross-Site (medium 4.8)
- [CVE-2022-40963](https://insights.sbomify.com/CVE-2022-40963/): WordPress WP Page Builder plugin <= 1.2.6 - Multiple Auth. Stored Cross-Site Scripting (XSS) vulnerabilities (medium 4.8)
- [CVE-2021-24207](https://insights.sbomify.com/CVE-2021-24207/): WP Page Builder < 1.2.4 - Insecure default configuration Allows Subscribers Editing Access to Posts (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24208 and fix it if it is affected.

What it is: CVE-2021-24208 is a medium-severity cross-site scripting vulnerability in Unknown WP Page Builder, published on 5 Apr 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-2021-24208 in the wild and no public exploit code.

Affected product: Unknown WP Page 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-2021-24208/ (Markdown: https://insights.sbomify.com/CVE-2021-24208/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24208
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24208
- OSV: https://osv.dev/vulnerability/CVE-2021-24208

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-24208/
Summaries are generated and may contain mistakes; the official description above is the record.