# CVE-2021-24218: Facebook for WordPress 3.0.0-3.0.3 - CSRF to Stored XSS and Settings Deletion

> Attackers can exploit CSRF to inject malicious scripts and delete settings in the Facebook for WordPress plugin, requiring an upgrade to fix.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-28p8-w9v3-x57w

## What is CVE-2021-24218?

CVE-2021-24218 is a high-severity vulnerability in Unknown Facebook for WordPress, published on 12 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The wp_ajax_save_fbe_settings and wp_ajax_delete_fbe_settings AJAX actions of the Facebook for WordPress plugin before 3.0.4 were vulnerable to CSRF due to a lack of nonce protection. The settings in the saveFbeSettings function had no sanitization allowing for script tags to be saved.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2021-24218?

It affects 1 product.


Products: Facebook Facebook.

## How do I fix CVE-2021-24218?

No fix has been published for CVE-2021-24218 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24218 being exploited?

There is no known exploitation of CVE-2021-24218 in the wild and no public exploit code.

## Other vulnerabilities in Unknown Facebook for WordPress

- [CVE-2021-24217](https://insights.sbomify.com/CVE-2021-24217/): Facebook for WordPress < 3.0.0 - PHP Object Injection with POP Chain (high 8.1)
- [CVE-2014-6392](https://insights.sbomify.com/CVE-2014-6392/): Cross-site scripting in n/a (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24218 and fix it if it is affected.

What it is: CVE-2021-24218 is a high-severity vulnerability in Unknown Facebook for WordPress, published on 12 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-24218 in the wild and no public exploit code.

Affected product: Unknown Facebook 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-2021-24218/ (Markdown: https://insights.sbomify.com/CVE-2021-24218/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24218
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24218
- OSV: https://osv.dev/vulnerability/CVE-2021-24218

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24218/
Summaries are generated and may contain mistakes; the official description above is the record.