CVE-2026-8205MEDIUMCVSS 5.3

Concrete CMS is vulnerable to authorization bypass in the Calendar Block

Published May 21, 2026·Updated Jun 24, 2026

Description

Concrete CMS 9.5.0 and below is vulnerable to authorization bypass in the Calendar Block since action_get_events does not check canView on the calendar which results in restricted event details being disclosed.

Affected Packages (1)

concrete5/concrete5COMPOSER
Fixed in 9.5.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

View on NVD Search GitHub Search Google

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