Auth bypass in Klubraum Membership Request
CVE-2026-4604
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.
Vulnerability class: Broken Access Control
EPSS: 0.002 (14.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Klubraum Membership Request — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-4604?
- CVE-2026-4604 is a medium-severity vulnerability in Klubraum Membership Request, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-07-29.
- How severe is CVE-2026-4604?
- Medium severity. CVSS v3 base score is 5.3 out of 10.