Description

Subscriber Broken Access Control in ReactPress <= 3.4.0 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.0",
  "pubDate": "2026-08-13T14:17:06.550Z",
  "pubdate": "2026-08-13T14:17:06.550Z",
  "executiveSummary": "A broken access control vulnerability has been identified in the ReactPress product affecting versions 3.4.0 and below. This security flaw allows low-privileged users, specifically those with Subscriber level access, to perform unauthorized actions due to improper authorization checks within the application logic. The vulnerability exposes the affected system to security boundary bypasses, potentially permitting unauthorized data manipulation or administrative function execution depending on the exposed endpoints. Attackers possessing standard subscriber credentials can exploit this deficiency without meeting the intended administrative or privileged requirements, thereby undermining the integrity and confidentiality of the WordPress site running the vulnerable ReactPress plugin. The risk implications include unauthorized privilege escalation capabilities within the context of the plugin functionality, allowing malicious actors to abuse features restricted to higher privilege tiers. Exploitation requires authenticated access at the subscriber level, meaning an attacker must first provision or compromise a baseline user account within the target system to interact with the insecurely implemented API endpoints or functions.",
  "technicalDetails": "The vulnerability stems from insufficient or absent authorization enforcement mechanisms within the ReactPress plugin for versions 3.4.0 and below. Specifically, the affected component fails to adequately validate whether the current user context possesses the requisite capabilities or roles before executing sensitive backend functions or processing state-changing requests. In a standard WordPress architecture, robust access control requires explicit capability checks using functions such as current_user_can() alongside nonce verifications to ensure requests originate from legitimate UI interactions. However, within the vulnerable ReactPress codebase, endpoints or AJAX handlers exposed to authenticated users incorrectly permit accounts assigned the Subscriber role to invoke restricted operations.\nThe attack flow begins when an authenticated adversary with subscriber-level privileges interacts with the target WordPress instance. The attacker identifies the exposed functional routes or AJAX actions managed by ReactPress that lack proper role-based validation. By crafting custom HTTP requests directed at these vulnerable endpoints, the attacker bypasses the intended security boundaries. Because the backend logic trusts the incoming session without enforcing strict privilege verification, the application processes the request and executes the privileged action on behalf of the low-privileged user.\nThe root cause is a failure of secure design principles regarding authorization, specifically vertical privilege management, where access restrictions are not properly enforced across different user tiers. The vulnerability affects network-exposed components of the ReactPress plugin handling specific plugin operations. The authentication requirement is minimal, needing only a baseline subscriber session, while the privilege requirement is improperly bypassed due to flawed backend validation logic. Post-exploitation impact includes the unauthorized execution of restricted plugin features, potential exposure of sensitive configuration data, or manipulation of plugin-specific resources that should be exclusively controlled by administrators or editors."
}