CVE-2025-6003: WordPress SSO Auth Bypass Vulnerability

CVE-2025-6003 Overview

CVE-2025-6003 is a broken authorization vulnerability in the MiniOrange WordPress Single Sign-On (SSO) plugin. The flaw exists in all versions up to and including 6.5.3 and results from a misconfigured capability check on a plugin function. Unauthenticated attackers can send requests to the vulnerable endpoint and extract sensitive site content restricted to specific users or roles. The issue is tracked under CWE-863: Incorrect Authorization and affects confidentiality of protected WordPress content.

Critical Impact
Unauthenticated attackers can read restricted WordPress content, including posts and pages limited to specific users or roles, without any prior access to the target site.

Affected Products

MiniOrange WordPress Single Sign-On (SSO) plugin, all versions through 6.5.3
WordPress sites using the plugin for role-restricted content
Any hosting environment running the vulnerable plugin release

Discovery Timeline

2025-06-12 - CVE-2025-6003 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-6003

Vulnerability Analysis

The MiniOrange WordPress SSO plugin exposes a function that returns restricted site content. The function performs a capability check, but the check is misconfigured and does not properly verify the caller's authorization. As a result, requests from unauthenticated visitors reach protected content that should require a specific user role or capability.

The underlying weakness is classified as CWE-863: Incorrect Authorization. Authorization logic exists in the code path, but it does not enforce the intended access policy. Attackers do not need credentials, user interaction, or elevated privileges to trigger the flaw. The impact is limited to information disclosure. The vulnerability does not allow modification of content or denial of service.

Root Cause

The plugin registers a callable function that returns content protected by SSO role restrictions. The capability check inside that function references an incorrect capability or evaluates the check in a way that permits unauthenticated callers. Because WordPress relies on plugin-supplied capability checks to enforce content restrictions, the flawed check allows anonymous callers to bypass role gating.

Attack Vector

An attacker sends a network request to the vulnerable plugin endpoint on a target WordPress site. No authentication, session, or user interaction is required. The response contains site content that the SSO plugin was configured to restrict, such as pages or posts limited to authenticated users or specific roles. Attackers can automate enumeration across many WordPress sites running the plugin. Refer to the Wordfence Vulnerability Report for additional technical detail.

Detection Methods for CVE-2025-6003

Indicators of Compromise

Anonymous HTTP requests to MiniOrange SSO plugin endpoints under /wp-admin/admin-ajax.php or /wp-json/ returning content marked as role-restricted
Unusual volume of unauthenticated requests targeting plugin action names associated with content retrieval
Access log entries showing successful 200 responses to restricted content from IPs without prior authentication cookies

Detection Strategies

Inventory WordPress installations to identify any MiniOrange SSO plugin version at or below 6.5.3
Compare web server access logs against expected authenticated traffic patterns for restricted content URLs
Alert on unauthenticated requests to plugin AJAX or REST routes that return non-empty payloads exceeding a size threshold

Monitoring Recommendations

Enable verbose HTTP access logging on WordPress front-end and admin endpoints
Forward WordPress and web server logs to a centralized log platform for correlation
Track outbound response sizes for plugin endpoints to identify data extraction attempts
Review WordPress user activity logs for unexpected reads of role-protected content

How to Mitigate CVE-2025-6003

Immediate Actions Required

Update the MiniOrange WordPress Single Sign-On plugin to a version later than 6.5.3 as soon as the vendor publishes a fix
If no fixed version is available, deactivate and remove the plugin until a patch is released
Audit web server logs for prior unauthenticated access to restricted content served by the plugin
Rotate or reassess any sensitive content that may have been exposed through the vulnerable endpoint

Patch Information

Monitor the MiniOrange WordPress SSO plugin page and the WordPress plugin repository for a release that supersedes version 6.5.3. Apply the update through the WordPress admin dashboard or via WP-CLI once available.

Workarounds

Restrict access to WordPress AJAX and REST endpoints at the web application firewall by blocking unauthenticated requests to MiniOrange SSO plugin actions
Enforce IP allowlisting on WordPress admin and plugin endpoints where feasible
Temporarily disable the affected plugin and rely on native WordPress role restrictions until a patched version is deployed

bash

# Disable the vulnerable plugin using WP-CLI until a patched version is available
wp plugin deactivate miniorange-wp-sso
wp plugin status miniorange-wp-sso