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HIGH

CVE-2026-88824

CVSS v3

8.8

HIGH

EPSS Score

0.5 %

exploit probability, as of 2026-09-28

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published
2026-09-19
Last Modified
2026-09-19

Frequently asked questions

What is CVE-2026-88824?

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.

Is CVE-2026-88824 actively exploited?

Active exploitation of CVE-2026-88824 has not been confirmed. Its EPSS score was 0.5% on 2026-09-28, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-88824?

CVE-2026-88824 has a CVSS v3 base score of 8.8 (HIGH severity).

Is CVE-2026-88824 affecting your environment?

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