What is CVE-2026-7887?

CVE-2026-7887 is a medium-severity vulnerability in Concrete Cms, classified under CWE-1287. CVSS score: 6.4/10. Published 2026-05-21.

How severe is CVE-2026-7887?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Vulnerability in Concrete Cms

CVE-2026-7887

For Concrete CMS 9.5.0 and below, OAuth 2.0 Authorization-Code Handler Bypasses Account Status. A user with uIsActive=0 (suspended, banned, terminated employee) can still authenticate via OAuth and receive valid API tokens. The Concrete CM…

EPSS: 0.000 (11.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Concrete Cms — versions 5.0
Concretecms Concrete_cms

Weakness classification (CWE)

CWE-1287

References

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

Frequently asked questions

What is CVE-2026-7887?: CVE-2026-7887 is a medium-severity vulnerability in Concrete Cms, classified under CWE-1287. CVSS score: 6.4/10. Published 2026-05-21.
How severe is CVE-2026-7887?: Medium severity. CVSS v3 base score is 6.4 out of 10.