GHSA-f54h-78c9-c24h

ghsaUSosv

Concrete CMS: OAuth 2.0 Authorization-Code Handler Bypasses Account Status

view advisory published 2026-05-22Licence: CC-BY-4.0

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-7887US	medium6.4	0.17% (7th)	—	2026-05-21
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 authentic…

references

External citations — patches, advisories, analysis.

https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notesWEB
https://github.com/concretecms/concretecmsPACKAGE
https://nvd.nist.gov/vuln/detail/CVE-2026-7887ADVISORY

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