CVE-2026-88824 — HIGH (8.8)

Vulnerability 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.

CVSS Score

8.8

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-79

References

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

FAQ

What is CVE-2026-88824?

CVE-2026-88824 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 unescape...

How severe is CVE-2026-88824?

CVE-2026-88824 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-88824?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.