Remote Code Execution Vulnerability in FireBox WooCommerce Popup Builder Plugin for WordPress
CVE-2026-76801

8.8HIGH

Key Information:

Vendor

WordPress
Status
Firebox – WooCommerce Popup Builder, Exit Intent Popup, Email Optin & Cart Abandonment
Vendor
CVE Published:
9 September 2026

What is CVE-2026-76801?

The FireBox – WooCommerce Popup Builder plugin for WordPress exhibits a significant vulnerability allowing remote code execution. Authenticated users with Author-level permissions can exploit this flaw due to an insufficiently protected regex blacklist in the Executer::allowedToRun() function. This oversight permits unauthorized execution of core WordPress functions, such as wp_insert_user, update_option, and file_put_contents. Additionally, the lack of input sanitization for PHP condition rule values saved via the firebox_meta REST endpoint exacerbates this issue. Particularly alarming is the Migrator::preserveCampaignRoleAccess() function, which inadvertently broadens attack vectors by granting elevated privileges to users on sites that have upgraded from earlier versions.

Affected Version(s)

FireBox – WooCommerce Popup Builder, Exit Intent Popup, Email Optin & Cart Abandonment 0 <= 3.1.10

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/firebox/tags/3...
https://plugins.trac.wordpress.org/browser/firebox/tags/3...

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Wordfence PRISM
.