What is CVE-2026-14558?

CVE-2026-14558 is a high-severity vulnerability, classified under Deserialization of Untrusted Data. CVSS score: 7.2/10. Published 2026-08-28.

How severe is CVE-2026-14558?

High severity. CVSS v3 base score is 7.2 out of 10.

CVE-2026-14558

CVE-2026-14558

The User Frontend WordPress plugin before 4.3.10 does not properly validate field type definitions and deserialises user-controlled post metadata when rendering submitted posts, allowing users with Editor-level access and above to inject arbitrary PHP objects, which can lead to remote code execution when a suitable POP chain is present on the site.

Vulnerability class: Insecure Deserialization

EPSS: 0.004 (28.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-14558?: CVE-2026-14558 is a high-severity vulnerability, classified under Deserialization of Untrusted Data. CVSS score: 7.2/10. Published 2026-08-28.
How severe is CVE-2026-14558?: High severity. CVSS v3 base score is 7.2 out of 10.