CVE-2026-54239 Faust.js FaustWP - Broken Access Control

Faust.js FaustWP WordPress plugin < 1.8.11 contains a broken access control caused by excluding the initialization vector from HMAC validation in token encryption, letting logged-in non-administrators escalate to administrator privileges and execute arbitrary code, exploit requires logged-in non-administrator access.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.32% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Remote Code Execution, Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026
Weakness
CWE-345

Vendor fix

Update to version 1.8.11 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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