CVE Catalog

CVE-2026-88824

HighCVSS 8.8
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.28%

20th percentile - higher than 20% of all known CVEs

Summary

The Master Blocks WordPress plugin before 1.5.0 does not have authorisation on one of its REST routes, allowing unauthenticated users to update its settings, including a value that is output unescaped in the admin area, leading to Stored XSS that executes in the session of any administrator visiting a wp-admin page.

Risk Assessment

An attacker can inject malicious scripts that execute in the administrator's browser, enabling session hijacking, data theft, or further privilege escalation.

Recommendation

Update the plugin to version 1.5.0 or later. Restrict access to REST routes and regularly review logs for unauthorized setting changes.

Related vulnerabilities

Original NVD description (English source)

The Master Blocks WordPress plugin before 1.5.0 does not have authorisation on one of its REST routes, allowing unauthenticated users to update its settings, including a value that is output unescaped in the admin area, leading to Stored XSS that executes in the session of any administrator visiting a wp-admin page.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS