Description

Subscriber Privilege Escalation in Bricksforge <= 3.1.8.8 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.8",
  "pubDate": "2026-09-03T17:17:29.277Z",
  "pubdate": "2026-09-03T17:17:29.277Z",
  "executiveSummary": "A privilege escalation vulnerability has been identified in Bricksforge versions 3.1.8.8 and earlier. The flaw resides in the plugin's handling of user capabilities and authorization checks during specific administrative operations.\nThe vulnerability allows an authenticated user with low-level privileges, specifically the 'subscriber' role, to perform unauthorized actions intended exclusively for administrative accounts. This constitutes an Improper Authorization (CWE-285) vulnerability.\nBy exploiting this flaw, an attacker can bypass access control mechanisms to gain elevated privileges, potentially leading to full site compromise, unauthorized configuration changes, or the execution of administrative functions. The attack is executable over the network and requires a valid, albeit low-privileged, account. No specific complex interaction is needed beyond triggering the vulnerable function. This vulnerability presents a significant security risk to environments running Bricksforge, as it breaks the fundamental tenant of least privilege by allowing subscribers to escape their restricted environment.\nOrganizations using affected versions of Bricksforge are advised to treat this as a critical security issue and apply recommended remediations immediately to prevent unauthorized privilege escalation.",
  "technicalDetails": "The vulnerability originates from a failure to implement robust capability checks (e.g., using current_user_can()) on sensitive backend actions within the Bricksforge plugin architecture. Specifically, the affected components do not properly validate the identity or permission level of the request initiator before executing privileged operations.\nIn WordPress plugin development, security relies on the principle of authorization validation within every AJAX, REST API, or POST request handler. In this instance, the plugin exposes endpoints or handles requests that invoke functionality designed for administrative use without verifying if the requesting user possesses the required 'manage_options' or equivalent high-level capabilities. As a result, when a user with the 'subscriber' role submits a specially crafted request to these vulnerable endpoints, the server processes the command as if it were originated by an administrator.\nThe attack flow proceeds as follows: 1) The attacker authenticates as a standard subscriber on the target WordPress installation. 2) The attacker identifies the vulnerable endpoint or request handler responsible for executing administrative tasks. 3) The attacker constructs a HTTP request (e.g., a POST request) containing the parameters required to trigger the desired administrative operation. 4) The server receives this request, fails to perform an adequate capability check, and proceeds to execute the requested logic with the context of an administrator, despite the session being tied to a subscriber-level user.\nThe root cause is a deficiency in input validation and authorization logic within the PHP code responsible for managing plugin settings or administrative tasks. This allows for horizontal and vertical privilege escalation. The scope of impact is broad, depending on what administrative actions are exposed through the vulnerable code. If the code allows for modification of plugin settings, an attacker could potentially modify arbitrary options, inject malicious code, or alter user management parameters. Post-exploitation, an attacker may achieve complete site takeover, facilitate further lateral movement within the WordPress environment, or gain persistence by creating additional administrative accounts. Given the nature of WordPress plugins, this vulnerability is network-exposed, making it accessible to any authenticated user regardless of their location, provided they can reach the target site's authentication interface."
}