CVE-2026-4604

Received Received - Intake

Unauthenticated Settings Modification in Klubraum Membership Request WordPress Plugin

Publication date: 2026-07-29

Last updated on: 2026-07-29

Assigner: Wordfence

Description

The Klubraum Membership Request plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `kr_mr_store_settings()` function in all versions up to, and including, 1.1.0. This makes it possible for unauthenticated attackers to update the plugin's settings, including the Klubraum API token and introduction text, effectively hijacking the plugin's integration with the Klubraum service.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-29

Last Modified

2026-07-29

Generated

2026-08-19

AI Q&A

2026-07-30

EPSS Evaluated

2026-08-18

NVD

CVE-2026-4604

Affected Vendors & Products

Vendor	Product	Version / Range
klubraum	membership_request	to 1.1.0 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

The Klubraum Membership Request WordPress plugin up to version 1.1.0 has a vulnerability where the kr_mr_store_settings() function lacks a capability check. This allows unauthenticated attackers to modify plugin settings, including the Klubraum API token and introduction text, potentially hijacking the plugin's integration with the Klubraum service.

Detection Guidance

Check for unauthorized changes to the plugin's settings in WordPress. Inspect the Klubraum API token and introduction text for unexpected modifications. Review server logs for unusual POST requests to the kr_mr_store_settings function.

Impact Analysis

An attacker could change the plugin's settings, including the API token, which might disrupt the plugin's functionality or redirect it to malicious services. This could lead to unauthorized access or misuse of the Klubraum service integration.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR or HIPAA if the unauthorized modification of plugin settings leads to exposure or mishandling of sensitive user data. However, the provided CVE details do not specify direct data exposure or privacy violations, only unauthorized setting changes.

Mitigation Strategies

Update the Klubraum Membership Request plugin to the latest version beyond 1.1.0 to ensure the missing capability check is patched.

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