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VULNERABILITIES

CVE-2026-7887 Details

Description

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 CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N. Thanks 0x4c616e for reporting.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes ConcreteCMSRelease Notes

Weakness Enumeration

CWE-IDCWE NameSource
CWE-1287Improper Validation of Specified Type of InputConcreteCMS

Affected Products

ProductVersions
concretecms concrete cms
< 9.5.1

CPE

  • cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-7887
NVD Published Date:
May 21, 2026
NVD Last Modified:
Jul 23, 2026
Source:
ConcreteCMS
CVE-2026-7887 Details - Not Deferred