CVE-2026-75930: CWE-862 Missing Authorization in roxnor FundEngine – Donation and Crowdfunding Platform

CVE-2026-75930 is an authorization bypass vulnerability in the FundEngine – Donation and Crowdfunding Platform WordPress plugin affecting all versions up to and including 1.8.1. The flaw arises from improper verification of user authorization, allowing authenticated users with subscriber-level privileges or higher to modify arbitrary posts and pages. Attackers can overwrite the title and content and seize ownership by supplying a malicious post_author integer that bypasses wp_kses_post sanitization. The required wp_rest nonce is trivially obtainable by any logged-in user via the admin-ajax.php endpoint, rendering it ineffective as an authorization control.

An authenticated attacker with subscriber-level access or higher can modify arbitrary posts and pages, including changing content and ownership. This could lead to unauthorized content manipulation and potential privilege escalation within the WordPress site. The vulnerability does not impact confidentiality or availability but allows integrity compromise of site content.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict subscriber-level user privileges where possible and monitor for unauthorized content changes. Avoid relying solely on wp_rest nonce for authorization checks.