What is CVE-2026-110963?

CVE-2026-110963 is a critical-severity vulnerability in Userplace, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2026-11-08.

How severe is CVE-2026-110963?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Privilege escalation in Userplace

CVE-2026-110963

The Userplace WordPress plugin through 1.2.0 does not perform authorization checks on an AJAX action available to unauthenticated users and publicly exposes the nonce that protects it, allowing unauthenticated attackers to create an administrator account or write arbitrary site options, leading to full site takeover.

Vulnerability class: Privilege Escalation

Published 2026-11-08 · last modified 2026-11-08.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (3.1th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Userplace

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

wpscan.com/vulnerability/c30f71d3-2ec4-4bee-8864-f7c19cf6fcb7/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-110963?: CVE-2026-110963 is a critical-severity vulnerability in Userplace, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2026-11-08.
How severe is CVE-2026-110963?: Critical severity. CVSS v3 base score is 9.8 out of 10.