CVE-2026-68533
Missing Authorization in Concrete CMS versions below 9.5.3 Conversation File Upload Allows File Import Without the Add Message Attachments Permission
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | concrete cms |
| Product | concrete cms |
| Published | Sep 15, 2026 |
| Last Updated | Sep 15, 2026 |
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Affected Versions
Concrete CMS / Concrete CMS
5.0.0 ≤ 9.5.2
References
Credits
riodrwn