CVE-2026-85387

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Source

https://cve.org/CVERecord?id=CVE-2026-85387

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85387.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-85387

Published

2026-09-16T17:12:05Z

Modified

2026-09-19T03:30:15Z

Severity

2.0 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

Concrete CMS before 9.5.4 allows a deactivated user to retain OAuth-authenticated REST API access

Details

Concrete CMS before 9.5.4 re-authorized OAuth REST API requests from the bearer token alone and did not re-check the state of the account the token had been issued to. The resource server's authorization validator confirmed only that a token existed, had not expired, and had not been explicitly revoked, and deactivating a user did not revoke that user's outstanding tokens. As a result, a deactivated user retained full access to /ccm/api/1.0/* for the remaining lifetime of any token already issued to them. The same gap applied to accounts that had been deleted or locked pending a forced password reset. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 2.0 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Myq Larson for reporting.

Database specific

{
    "cna_assigner": "ConcreteCMS",
    "cwe_ids": [
        "CWE-613"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85387.json"
}

References

Affected packages

Git / github.com/concretecms/concretecms

Affected ranges

Type

GIT

Repo

https://github.com/concretecms/concretecms

Events

Introduced

Last Affected

9379c29cb26a1054208b37507b6869811aa75a32

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "5.0.0"
        },
        {
            "last_affected": "9.5.3"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

5.*

5.7.0

5.7.0.1

5.7.0.3

5.7.0.4

5.7.1

5.7.2

5.7.2.1

5.7.3

5.7.3.1

5.7.4.1

5.7.5.2

5.7.5.5

5.7.5.6

5.7.5.7

8.*

8.1.0

8.2.0

8.2.0RC2

8.2.1

8.3.1

8.4.1

9.*

9.3.0

9.3.1

9.3.2

9.3.3

9.3.4

9.3.5

9.3.6

9.3.7

9.4.0

9.4.0RC1

9.4.0RC2

9.4.1

9.4.2

9.4.3

9.4.4

9.5.0

9.5.0RC1

9.5.0RC2

9.5.1

9.5.2

9.5.3

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85387.json"