CVE-2026-81909 Concrete CMS 9 through 9.5.2 is vulnerable to Missing Authorization in the orphaned-block alias route, allowing an authenticated editor to disclose and force-delete arbitrary blocks

Concrete CMS 9 through 9.5.2 is vulnerable to Missing Authorization in the block alias route Process::alias in concrete/controllers/backend/block/process.php.It does not verify that the referenced block is genuinely orphaned on the target page, nor that the caller holds any permission over the...

CVE-2026-81909

Concrete CMS versions 9 through 9.5.2 contain a Missing Authorization flaw in the block alias route (Process::alias() in concrete/controllers/backend/block/process.php). The function fails to verify that a referenced block is genuinely orphaned on the target page and that the caller holds permiss...