What is CVE-2026-8350?

CVE-2026-8350 is a high-severity vulnerability in Concrete Cms, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2026-05-21.

How severe is CVE-2026-8350?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Concrete Cms

CVE-2026-8350

Concrete CMS 9.5.0 and below is vulnerable to missing authorization in the bulk_user_assignment.php which can lead to privilege escalation to Administrative Group. Any authenticated user with access to the bulk user assignment dashboard pa…

Vulnerability class: Broken Access Control

EPSS: 0.000 (9.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Concrete Cms — versions 5.0
Concretecms Concrete_cms

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

ff5b8ace-8b95-4078-9743-eac1ca5451de (release-notes, Release Notes)

Frequently asked questions

What is CVE-2026-8350?: CVE-2026-8350 is a high-severity vulnerability in Concrete Cms, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2026-05-21.
How severe is CVE-2026-8350?: High severity. CVSS v3 base score is 8.8 out of 10.