Vulnerability 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.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-68533?
CVE-2026-68533 is a documented vulnerability. 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 fil...
How severe is CVE-2026-68533?
CVSS scoring is not yet available for CVE-2026-68533. Check NVD for updates.
Is there a patch for CVE-2026-68533?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.