CVE-2026-32452 in Fusion Builder Plugin
Summary
by MITRE • 03/13/2026
Missing Authorization vulnerability in ThemeFusion Fusion Builder fusion-builder allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Fusion Builder: from n/a through < 3.15.0.
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Analysis
by VulDB Data Team • 03/15/2026
The vulnerability identified as CVE-2026-32452 represents a critical missing authorization flaw within the ThemeFusion Fusion Builder fusion-builder component, specifically impacting versions prior to 3.15.0. This security weakness stems from incorrectly configured access control security levels that fail to properly validate user permissions before granting access to sensitive administrative functions. The flaw exists in the core authorization mechanisms that should enforce proper role-based access control for content creation and modification operations within the WordPress environment.
This missing authorization vulnerability operates at the application level and directly violates fundamental security principles outlined in CWE-285, which addresses improper authorization within software systems. The issue allows unauthorized users to potentially exploit the fusion-builder functionality without proper authentication or permission validation, creating a significant attack surface for malicious actors. The vulnerability's impact extends beyond simple privilege escalation as it enables attackers to manipulate content creation workflows and potentially modify website structures through the builder interface.
The operational impact of this vulnerability manifests when unauthenticated or low-privilege users gain access to administrative features typically restricted to authorized administrators or editors. Attackers could leverage this flaw to inject malicious content, modify existing pages, or potentially compromise the entire website through the Fusion Builder's content management capabilities. The vulnerability's exploitation requires minimal prerequisites since it involves misconfigured access controls rather than complex attack vectors, making it particularly dangerous in environments where multiple users have varying permission levels.
Security professionals should note that this vulnerability aligns with ATT&CK technique T1078 which covers valid accounts and credential access, as the flaw essentially allows unauthorized access to privileged functions through improperly configured security controls. The affected system architecture demonstrates a failure in implementing proper access control checks during the fusion-builder's operation, particularly in the validation of user roles and capabilities before executing sensitive operations. Organizations running affected versions of Fusion Builder should immediately implement the available patch updates to address this missing authorization issue.
Mitigation strategies include immediate deployment of the patched version 3.15.0 or higher, followed by comprehensive security audits of all WordPress installations to identify similar access control misconfigurations. Additionally, implementing proper input validation and access control checks at multiple layers of the application architecture can prevent similar issues from occurring in the future. Security monitoring should be enhanced to detect unusual access patterns or unauthorized attempts to utilize content builder functionalities, as these activities could indicate exploitation attempts targeting this vulnerability.