Description

Subscriber Privilege Escalation in The Grid <= 2.7.9.1 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.8",
  "pubDate": "2026-08-18T14:17:02.057Z",
  "pubdate": "2026-08-18T14:17:02.057Z",
  "executiveSummary": "An authenticated privilege escalation vulnerability exists within The Grid plugin for versions 2.7.9.1 and prior. This security flaw allows malicious actors authenticated as low-privileged users, specifically subscribers, to elevate their access privileges to administrative levels within the affected system. The vulnerability poses significant risk implications, as successful exploitation grants attackers full administrative control over the underlying application, potentially leading to unauthorized data access, arbitrary code execution, and complete system compromise. Attack capabilities require low-privileged subscriber access to initiate the attack flow, relying on improper access controls and insufficient authorization checks within the vulnerable software component. Exploitation requirements mandate that the attacker maintains a valid subscriber-level account on the target system to interact with vulnerable functions. The overall impact compromises the confidentiality, integrity, and availability of the affected WordPress environment.",
  "technicalDetails": "The root cause of the subscriber privilege escalation vulnerability in The Grid plugin <= 2.7.9.1 stems from inadequate authorization enforcement and missing capability checks within internal administrative routines. Specifically, the vulnerable component fails to properly validate whether the currently authenticated user possesses the requisite administrative capabilities before processing sensitive requests or modifying privileged user meta data and roles. The affected versions include all iterations of The Grid up to and including version 2.7.9.1. Authentication requirements dictate that the attacker must possess a valid, authenticated user session with minimal subscriber-level privileges to initiate contact with the target endpoints. Privilege requirements are nominally low, as standard subscriber accounts can trigger the flaw due to the absence of robust role-based access control validation. The network exposure is inherent to the web application hosting the vulnerable plugin, typically accessible via standard HTTP or HTTPS protocols. The attack flow proceeds as follows: First, the authenticated attacker with subscriber privileges crafts a specialized HTTP request targeting insufficiently protected AJAX actions, REST API endpoints, or administrative form handlers exposed by The Grid plugin. Second, the vulnerable component processes the incoming request without performing adequate nonce verification or current_user_can capability checks. Third, the lack of strict input sanitization and authorization validation allows the malicious payload to successfully interact with backend functions responsible for user role management or privilege assignment. Consequently, the application processes the unauthorized modification, elevating the subscriber account to an administrator role. Post-exploitation impact includes full administrative takeover of the affected WordPress site, enabling the malicious actor to install arbitrary plugins, modify theme files, harvest sensitive database contents, execute arbitrary code, and pivot to other connected network resources."
}