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OpenAdvisories
Low · 2.3 CVE-2026-7887 EUVD-2026-31364GHSA-f54h-78c9-c24h

For Concrete CMS 9.5.0 and below, OAuth 2.0 Authorization-Code Handler Bypasses Account Status

Published May 21, 2026 · Updated May 22, 2026 · Assigned by ConcreteCMS

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.

Affected products

VendorProductAffectedFixed
Concrete CMS Concrete CMS — —

Affected packages

EcosystemPackageAffectedFixedRecord
Packagist concrete5/concrete5 < 9.5.1 9.5.1 GHSA-f54h-78c9-c24h

References