CVE-2026-78153
Received Received - Intake

Unauthenticated REST API Access Bypass in Restrict User Access WordPress Plugin

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: WPScan

Description
The Restrict User Access WordPress plugin before 2.8.1 does not normalise the REST API route before checking it against the routes its content protection covers, allowing unauthenticated users to bypass that protection and read restricted content and enumerate users.

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-02
AI Q&A
2026-09-02
EPSS Evaluated
N/A
NVD
CVE-2026-78153
EUVD
EUVD-2026-70042

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
restrict_user_access restrict_user_access to 2.8.1 (exc)
restrict_user_access restrict_user_access From 2.6 (inc) to 2.8 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

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Executive Summary

The Restrict User Access WordPress plugin before version 2.8.1 has a flaw where it does not properly normalize REST API routes before checking if they are protected. This allows unauthenticated users to bypass content restrictions and access protected content or enumerate users.

Detection Guidance

To detect this vulnerability, check if you are running the Restrict User Access WordPress plugin versions 2.6 to 2.8. Verify the plugin version in your WordPress admin panel under Plugins. You can also use WPScan to check for vulnerable versions with the command: wpscan --plugin-detection --plugins-detection-mode aggressive --url <your-site-url>.

Impact Analysis

This vulnerability allows unauthorized users to read restricted content and list users on a WordPress site using the affected plugin versions. Attackers could exploit it to access sensitive information without authentication.

Mitigation Strategies

Immediately update the Restrict User Access plugin to version 2.8.1 or later. If updating is not possible, consider disabling the plugin temporarily until an update is applied. Review all user roles and permissions to ensure no unauthorized access has occurred.

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