Privilege escalation in Pouco Import Users

CVE-2026-16256

The POUCO Import Users WordPress plugin through 1.0.0 does not perform any capability or nonce checks on AJAX actions available to unauthenticated users that create and update WordPress accounts, and it trusts an attacker-supplied role value, allowing unauthenticated attackers to create a new administrator account and take over the site.

Vulnerability class: Privilege Escalation

Published · last modified .

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: 0.005 (42.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-16256: held from 0.005 to 0.005.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

  • Pouco Import Users — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-16256?
CVE-2026-16256 is a critical-severity vulnerability in Pouco Import Users, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2026-08-02.
How severe is CVE-2026-16256?
Critical severity. CVSS v3 base score is 9.8 out of 10.