CVE-2026-88824

HIGHCVSS 8.8

Description

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.

Timeline

Published:September 19th, 2026 7:16 AM

Last modified:September 21st, 2026 1:34 PM

CVSS Scoring

CVSS v3: 8.8 (HIGH)

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-79

References & Reports

Advisories, patches, and third-party reports

https://wpscan.com/vulnerability/898fda0a-4d27-4def-ae6f-35bf25a8ae8d/

Source: NIST NVD · Data may lag official sources by up to one minute