# CVE-2026-66707: Meta Facebook for WooCommerce unauthenticated XSS

Source: https://junglewise.ai/threats/cve-2026-66707-meta-facebook-for-woocommerce-unauthenticated-xss  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-06. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-66707 · Severity: high · CVSS 7.1 · Published 2026-08-06

Facebook for WooCommerce is a WordPress plugin that integrates Facebook's commerce features with WooCommerce online stores. Versions 3.7.5 and earlier contain an unauthenticated cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into the website. Successful exploitation requires user interaction and could enable attackers to steal visitor data, hijack customer accounts, or compromise store operations.

Vendors: [Meta](https://junglewise.ai/threats/vendors/meta).

## Quick answers

**Is CVE-2026-66707 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-66707 being exploited in the wild.

**How severe is CVE-2026-66707?** High severity, with a CVSS score of 7.1, published 6 August 2026.

**Which products and versions are affected?** Meta Facebook for WooCommerce <=3.7.5.

**Is there a fix for CVE-2026-66707?** A patch was published on 2026-07-31: Version 3.7.6 released with patch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-66707 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-66707?** Check whether you run Meta Facebook for WooCommerce at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is a stored or reflected cross-site scripting (XSS) vulnerability in the Facebook for WooCommerce WordPress plugin (versions ≤3.7.5). The vulnerability allows unauthenticated attackers to inject malicious JavaScript code that executes in the context of website visitors' browsers. While the attack is unauthenticated at the network level, successful exploitation requires user interaction—typically a victim clicking a malicious link or visiting a crafted page. An attacker can steal session cookies, payment information, customer data, or perform actions on behalf of authenticated users. The vulnerability was patched in version 3.7.6.

## Affected products

- Meta Facebook for WooCommerce <=3.7.5

## Timeline

- 2026-07-03: disclosed
- 2026-07-31: patched: Version 3.7.6 released with patch
- 2026-08-06: advisory

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/facebook-for-woocommerce/vulnerability/wordpress-facebook-for-woocommerce-plugin-3-7-5-cross-site-scripting-xss-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/facebook-for-woocommerce/vulnerability/wordpress-facebook-for-woocommerce-plugin-3-7-5-cross-site-scripting-xss-vulnerability?_s_id=cve)

## Related threats

- [Facebook Facebook for WooCommerce open redirect](https://junglewise.ai/threats/cve-2026-49059-facebook-facebook-for-woocommerce-open-redirect)