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.
Published: 2026-09-19
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sun, 20 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sat, 19 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Sat, 19 Sep 2026 11:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79

Sat, 19 Sep 2026 06:30:00 +0000

Type Values Removed Values Added
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.
Title Master Blocks 1.4.1 - 1.4.1.4 - Unauthenticated Stored XSS via White Label Settings
References

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published:

Updated: 2026-09-19T13:18:55.698Z

Reserved: 2026-09-10T09:28:11.081Z

Link: CVE-2026-88824

cve-icon Vulnrichment

Updated: 2026-09-19T13:11:46.709Z

cve-icon NVD

Status : Deferred

Published: 2026-09-19T07:16:33.273

Modified: 2026-09-21T13:34:57.127

Link: CVE-2026-88824

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-19T23:15:17Z

Weaknesses