Auth bypass in Horearadu Mesmerize Companion
CVE-2025-12027
The Mesmerize Companion plugin for WordPress is vulnerable to unauthorized access and modification of data due to a missing capability check on the "openPageInCustomizer" and "openPageInDefaultEditor" functions in all versions up to, and including, 1.6.158. This makes it possible for authenticated attackers - with subscriber level access and above, on websites with the Mesmerize theme activated - to mark arbitrary pages as maintainable, wrap their content in custom sections, change page template metadata, and toggle the default editor flag without proper authorization.
Vulnerability class: Broken Access Control
EPSS: 0.003 (18.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Horearadu Mesmerize Companion — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-12027?
- CVE-2025-12027 is a medium-severity vulnerability in Horearadu Mesmerize Companion, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-02-19.
- How severe is CVE-2025-12027?
- Medium severity. CVSS v3 base score is 4.3 out of 10.