FireBox <= 3.1.10 - Authenticated (Author+) Remote Code Execution to Privilege Escalation

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-76801
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-09 03:17:24 UTC
Updated2026-09-09 15:33:47 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.005020000 probability, percentile 0.413370000 (date 2026-09-09)

Problem Types: CWE-269 | CWE-269 CWE-269 Improper Privilege Management

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fireplugins FireBox WooCommerce Popup Builder Exit Intent Popup Email Optin Cart Abandonment affected 3.1.10 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/firebox/tags/3.1.10/Inc/Core/Migrator.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/firebox/tags/3.1.10/Inc/Core/FB/Meta.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/9c1d8ec3-de01-4496-8d8b-b9604... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/firebox/tags/3.1.10/Inc/Framework/Inc/Base/Conditions... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/firebox/tags/3.1.10/Inc/Framework/Inc/Base/Executer.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Wordfence PRISM (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-19T20:01:09.000ZVendor Notified
CNA2026-09-08T13:51:53.000ZDisclosed

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