Missing Authorization Affecting craftcms/cms package, versions >=4.0.0-RC1, <4.17.8>=5.0.0-RC1, <5.9.14
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- published6 Jul 2026
- disclosed6 Jul 2026
- creditUnknown
Introduced: 6 Jul 2026
New CVE NOT AVAILABLE CWE-862 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade craftcms/cms to version 4.17.8, 5.9.14 or higher.
Overview
craftcms/cms is a content management system.
Affected versions of this package are vulnerable to Missing Authorization in the assets/preview-thumb endpoint when a user with Control Panel access but without asset-view permission requests a preview for a private asset. An attacker can obtain signed fallback transform preview links for private assets by supplying an attacker-controlled assetId parameter, potentially exposing sensitive asset data to unauthorized users.