CVE-2026-68533 Missing authorization in Concrete CMS
Attackers can import files into the file manager without proper authorization checks, bypassing attachment permissions in Concrete CMS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-68533?
CVE-2026-68533 is a low-severity missing authorization vulnerability in Concrete CMS, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-68533?
How do I fix CVE-2026-68533?
No fix has been published for CVE-2026-68533 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-68533 being exploited?
There is no known exploitation of CVE-2026-68533 in the wild and no public exploit code.
Sources
Also known as GHSA-2vf2-cvcp-v89w.