CVE-2026-76801 FireBox <= 3.1.10 - Authenticated (Author+) Remote Code Execution to Privilege Escalation
Authenticated attackers with author-level access can execute arbitrary code and escalate privileges due to insufficient input sanitization in the FireBox WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76801?
CVE-2026-76801 is a high-severity code injection vulnerability in fireplugins FireBox – WooCommerce Popup Builder, Exit Intent Popup, Email Optin & Cart Abandonment, published on 9 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The FireBox – WooCommerce Popup Builder, Exit Intent Popup, Email Optin & Cart Abandonment plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 3.1.10 via the value function. This is due to a trivially bypassable regex blacklist in Executer::allowedToRun() that fails to block WordPress core functions such as wp_insert_user, update_option, and file_put_contents, combined with no sanitization of PHP condition rule values stored via the firebox_meta REST endpoint. This makes it possible for authenticated attackers, with author-level access and above, to execute code on the server. On sites upgraded from a version prior to 3.1.10, the Migrator::preserveCampaignRoleAccess() function automatically grants the edit_fireboxes and publish_fireboxes capabilities to the Author role, lowering the effective entry point to Author-level access.
Weakness: CWE-269
Which versions are affected by CVE-2026-76801?
How do I fix CVE-2026-76801?
No fix has been published for CVE-2026-76801 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-76801 being exploited?
There is no known exploitation of CVE-2026-76801 in the wild and no public exploit code.
Sources
Also known as GHSA-48j6-7xh6-vcfv.