Concrete CMS below 9.5.3 conversation attachment uploaded endpoint imported files into the file manager before evaluating the "Add Message Attachments" permission, which was only checked after the file had been stored. A user denied that permission, or an unauthenticated visitor on a guest-posting configuration, could import approved files of allowed types into the file manager. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N. Thanks riodrwn for reporting.
Metrics
Affected Vendors & Products
References
History
Tue, 15 Sep 2026 21:00:00 +0000
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Concretecms
Concretecms concrete Cms |
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Concretecms
Concretecms concrete Cms |
Tue, 15 Sep 2026 20:30:00 +0000
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ssvc
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Tue, 15 Sep 2026 18:45:00 +0000
| Type | Values Removed | Values Added |
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| Description | Concrete CMS below 9.5.3 conversation attachment uploaded endpoint imported files into the file manager before evaluating the "Add Message Attachments" permission, which was only checked after the file had been stored. A user denied that permission, or an unauthenticated visitor on a guest-posting configuration, could import approved files of allowed types into the file manager. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N. Thanks riodrwn for reporting. | |
| Title | Missing Authorization in Concrete CMS versions below 9.5.3 Conversation File Upload Allows File Import Without the Add Message Attachments Permission | |
| Weaknesses | CWE-862 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: ConcreteCMS
Published: 2026-09-15T18:27:03.819Z
Updated: 2026-09-15T19:26:49.254Z
Reserved: 2026-07-30T18:04:50.763Z
Link: CVE-2026-68533
Updated: 2026-09-15T19:26:43.441Z
Status : Awaiting Analysis
Published: 2026-09-15T19:17:37.170
Modified: 2026-09-16T19:16:15.097
Link: CVE-2026-68533
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