CVE-2026-14956 in Bricksforge Plugin
Summary
by MITRE • 07/17/2026
The Bricksforge plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.1.8.6. This is due to improper validation of the fieldIds parameter in the Pro Forms registration action, which allows attacker-supplied field IDs to be added to the trusted form-field whitelist. This makes it possible for unauthenticated attackers to register a new administrator account by submitting a crafted request to a publicly accessible Bricksforge Pro Forms registration form. Successful exploitation requires that the site has a public Bricksforge Pro Forms element configured with the User Registration action.
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Analysis
by VulDB Data Team • 07/17/2026
The Bricksforge WordPress plugin vulnerability represents a critical privilege escalation flaw that undermines the security posture of affected websites. This vulnerability exists within the Pro Forms registration functionality and affects all versions up to and including 3.1.8.6, creating a significant attack surface for malicious actors who can exploit the improper validation mechanisms within the fieldIds parameter processing. The flaw specifically targets the trusted form-field whitelist mechanism that is designed to control which form fields can be manipulated during user registration processes. When an attacker submits a crafted request containing malicious field IDs, the system fails to properly validate these inputs against legitimate whitelist entries, allowing unauthorized modifications to the registration workflow.
The technical implementation of this vulnerability stems from inadequate input sanitization and validation routines within the Pro Forms component of the Bricksforge plugin. The fieldIds parameter, which should be strictly validated against a predefined set of authorized form fields, instead accepts attacker-supplied values without proper verification. This creates a dangerous condition where malicious field identifiers can be injected into the system's trusted whitelist, effectively bypassing the normal access controls that should prevent unauthorized account creation. The vulnerability operates through a straightforward injection mechanism where an unauthenticated user can manipulate the registration process by submitting specially crafted form data that includes field IDs not normally permitted in the registration workflow.
The operational impact of this privilege escalation vulnerability is severe and far-reaching for WordPress site administrators and their users. An attacker who discovers a public Bricksforge Pro Forms element configured with User Registration action can immediately exploit this vulnerability to create administrator accounts without any authentication requirements. This means that malicious actors can gain full administrative control over affected websites, allowing them to modify content, steal sensitive data, install malware, or completely compromise the website infrastructure. The vulnerability essentially transforms any public registration form into a backdoor for administrative access, making it particularly dangerous for sites that do not properly restrict access to their form elements. This type of vulnerability directly violates security principles established in the OWASP Top Ten and represents a failure in proper input validation as outlined in CWE-20.
The exploitation of this vulnerability requires only minimal prerequisites, specifically that a public Bricksforge Pro Forms element exists with User Registration action enabled. This makes the attack surface particularly broad since many WordPress sites have publicly accessible registration forms as part of their user engagement strategies. The attack vector is particularly insidious because it can be executed through standard web browser interaction without requiring any specialized tools or deep technical knowledge. From an ATT&CK framework perspective, this vulnerability maps directly to privilege escalation techniques under T1068 and access token manipulation categories, while the initial compromise could involve technique T1566 for initial access through the public form element. The vulnerability also relates to T1078 for valid accounts usage once administrative access is gained.
Mitigation strategies for this vulnerability require immediate action from site administrators to update to patched versions of the Bricksforge plugin where available. Until such updates are deployed, administrators should consider restricting access to Pro Forms elements that have User Registration actions enabled, or implementing additional authentication layers through WordPress security plugins. Network-level protections such as rate limiting and IP-based restrictions on form submission endpoints can provide temporary mitigation while longer-term solutions are implemented. The vulnerability highlights the critical importance of proper input validation and access control mechanisms in web applications, particularly within content management systems where user-generated forms are common. Security monitoring should include detection of unusual registration patterns and unauthorized administrative account creation attempts to identify potential exploitation of this vulnerability. Organizations should also implement comprehensive security testing procedures that specifically target form handling and privilege escalation mechanisms to prevent similar issues from occurring in other custom implementations or third-party plugins.