CVE-2026-6826MEDIUMCVSS 0.0

Concrete CMS is vulnerable to unauthenticated file usage disclosure

Published May 21, 2026·Updated Jun 23, 2026

Description

Concrete CMS 9.5.0 and below  is vulnerable to unauthenticated file usage disclosure via missing permission check in the usage controller.  Any unauthenticated visitor can request /ccm/system/dialogs/file/usage/{fID} with any file ID and receive a list of every page that references that file, including page IDs, handles, and full URLs. This includes pages that are otherwise restricted by permissions. Concrete CMS thanks Eldudareeno for reporting this issue.

Affected Packages (1)

concrete5/concrete5COMPOSER
Fixed in 9.5.1

References

View on NVD Search GitHub Search Google

Get alerted for CVEs like this

Register your stack and get notified within minutes when a matching CVE drops.

Start monitoring free