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Advisories

Craft CMS - Authorization Bypass in assets/preview-file Endpoint

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severity
medium
date
Affecting

  • cms >= 5.0.0-RC1, < 5.9.14

  • cms >= 4.0.0-RC1, < 4.17.8

CWE
  • CWE-639 Authorization Bypass Through User-Controlled Key
CVSS
5.3
CVSS V4 Vector
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
Credit
GCXWLP
Description
Craft CMS versions >= 5.0.0-RC1, <= 5.9.13 and >= 4.0.0-RC1, <= 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an asset they are not permitted to view and still receive preview response data (previewHtml), including a private preview image route containing the target private assetId. Fixed in 5.9.14 and 4.17.8.

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