MajorCritical vulnerability
CVE-2026-88824 (CVSS 8.8)
NVD · officialPublished Sep 19, 2026Risk 37/100EPSS 0.2%
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.
Technical details
CVSS
8.8
AV:NetworkAC:LowPR:NoneUI:RequiredC:HighI:HighA:High
Evidence and sources
This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.
Open primary source