CVE-2026-56384

MEDIUM EPSS 9.2%
Published Jun 21, 20261w ago · Modified Jun 22, 20261w ago
5.3 CVSS 4.0
Medium
Find Similar
Published Jun 21, 2026 1w ago
Last Modified Jun 22, 2026 1w ago

Description

Craft CMS contains a missing authorization vulnerability in the assets/preview-thumb endpoint. A Control Panel user without permission to view a target private asset can call the endpoint with an attacker-controlled assetId and receive preview HTML containing a signed fallback transform preview link for that private asset, because no asset-view permission check is performed before preview generation. This affects versions >= 4.0.0-RC1, <= 4.17.7 and >= 5.0.0-RC1, <= 5.9.13, and is fixed in 4.17.8 and 5.9.14.

CVSS Details

Base Score
5.3
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
9.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-862 Missing Authorization Authorization

References 3

  • github.com https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27
  • github.com https://github.com/craftcms/cms/security/advisories/GHSA-x76w-8c62-48mg
  • vulncheck.com https://www.vulncheck.com/advisories/craft-cms-missing-authorization-in-assets-preview-thumb-endpoint

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.