Description

Subscriber Insecure Direct Object References (IDOR) in Fluent Boards Pro <= 2.0.11 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.3",
  "pubDate": "2026-08-24T12:16:55.507Z",
  "pubdate": "2026-08-24T12:16:55.507Z",
  "executiveSummary": "An Insecure Direct Object References (IDOR) vulnerability has been identified in Fluent Boards Pro versions <= 2.0.11. This security flaw allows malicious authenticated users holding subscriber-level privileges to interact with and manipulate unauthorized objects or data within the application context. The vulnerability exposes the system to unauthorized data access, potential information disclosure, and unauthorized state modifications depending on the exposed endpoints. The risk implication is significant as it bypasses standard authorization checks enforced by the application's access control mechanisms. Attackers possessing low-privileged subscriber accounts can systematically enumerate or directly target object references by modifying parameters within requests sent to the server. Successful exploitation requires authenticated access at the subscriber tier, meaning an attacker must first provision or compromise a baseline user account within the vulnerable instance. Remediation requires implementing robust server-side authorization checks and enforcing proper object reference validation before processing state-changing or data-retrieval operations.",
  "technicalDetails": "The vulnerability stems from insufficient access control validation and authorization enforcement within the request handling logic of Fluent Boards Pro versions <= 2.0.11. Specifically, when a user initiates a request interacting with specific boards, tasks, or internal application objects, the underlying application fails to cryptographically verify or programmatically validate whether the currently authenticated session holder possesses the requisite administrative or ownership privileges to access the requested resource identifier.\nThe attack flow proceeds as follows: An attacker authenticates to the target WordPress instance using a standard, low-privileged subscriber account. The attacker then intercepts or constructs HTTP requests directed at vulnerable backend endpoints associated with Fluent Boards Pro. By swapping out predictable or sequentially enumerated object identifiers (such as board IDs, task IDs, or user metadata references) within the request parameters, the attacker can force the application to process operations against unauthorized records.\nBecause the server-side logic relies entirely on the presence of a valid session cookie rather than checking granular capabilities or object-level ownership maps, the request is executed successfully. The vulnerable components lack proper access control wrappers, allowing unauthorized data retrieval, modification, or deletion depending on the specific HTTP method and controller logic handling the manipulated parameter.\nThe vulnerability presents a network-exploitable vector accessible via standard HTTP/HTTPS protocols, requiring no advanced user interaction beyond the initial authentication phase. Post-exploitation impact includes the potential exposure of sensitive project management data, internal communications, and unauthorized manipulation of board configurations, severely compromising the confidentiality and integrity boundaries defined by the application's multi-tenant or role-based access architecture."
}