Description

Custom role Privilege Escalation in Vitepos <= 3.5.0 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.2",
  "pubDate": "2026-09-30T13:17:30.770Z",
  "pubdate": "2026-09-30T13:17:30.770Z",
  "executiveSummary": "The Vitepos plugin for WordPress, specifically in versions 3.5.0 and below, contains a critical privilege escalation vulnerability.\nThis flaw allows authenticated users with low-level privileges to modify their user roles to higher-privileged roles, such as Administrator.\nThe vulnerability type is improper authorization, which stems from insufficient validation of user input during role assignment processes.\nThe impact of this flaw is severe, potentially leading to a complete compromise of the WordPress installation.\nAn attacker must be authenticated as a user on the system to exploit this vulnerability, but no additional special privileges are required beyond basic access.\nThis represents a high risk to organizational security, as it bypasses intended access control mechanisms and facilitates unauthorized escalation of system authority.",
  "technicalDetails": "The root cause of the vulnerability lies in the improper handling and insufficient verification of user role assignment requests within the Vitepos plugin. In affected versions (<= 3.5.0), the application fails to adequately validate or restrict the user-supplied data that dictates role modifications during user profile updates or related requests.\nExploitation occurs when an authenticated user, typically with minimal privileges (such as a subscriber or customer), interacts with vulnerable API endpoints or AJAX handlers exposed by Vitepos. By crafting and submitting a malicious request, the attacker can supply parameters that instruct the application to update their own account permissions, elevating them to an arbitrary role, most notably the 'administrator' role.\nThe attack flow proceeds as follows: First, the attacker identifies the vulnerable endpoint or mechanism responsible for handling profile or user meta updates within Vitepos. Second, the attacker intercepts the request—typically while updating their own user profile—and injects or modifies parameters responsible for role assignment. Third, due to the lack of strict server-side validation against the current user's actual permissions to perform such an update, the backend processes the request and updates the database entry for the user, effectively elevating their privileges.\nThe vulnerable component resides within the plugin's user management or role-handling logic. Because this occurs at the application level, it bypasses standard WordPress permission checks if the plugin incorrectly implements its own authorization mechanisms or fails to adhere to established security practices for user meta management.\nSuccessful exploitation grants the attacker full administrative capabilities over the WordPress instance. Post-exploitation impact includes, but is not limited to: arbitrary code execution via plugin/theme installation or file editing, full access to sensitive data (including customer orders and user information), configuration changes, and the ability to pivot to other systems or install persistent backdoors.\nThe vulnerability is accessible to any user who has an active account on the site, regardless of their initial restricted role, provided they can interact with the vulnerable endpoint."
}