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VulnerabilityPublished Updated

craftcms/cms · Duplicate Advisory: Craft CMS: Authorized asset "preview file" requests bypass allows users without asset access to retrieve private preview metadata

Affects craftcms/cmsSource GCVE Database

0

CVSS 4.3 Medium · fixed in 4.17.8 : update craftcms/cms when convenient.

Data as of 7 Aug 2026, 07:16 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 4.17.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

What to do

Affected software

ProductAffectedFixed in
Packagistcraftcms/cmsAffected
  • >=5.0.0-RC1 <=5.9.13
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Update Craft CMS to version 4.17.8 or later, or 5.9.14 or later to apply the official fix for this authorization bypass vulnerability. No other mitigation steps are indicated by the vendor advisory.

Description

Craft CMS versions 4.0.0-RC1 through 4.17.7 and 5.0.0-RC1 through 5.9.13 contain an authorization bypass vulnerability in the assets/preview-file endpoint. This flaw allows authenticated users with low privileges to retrieve preview metadata for assets they are not authorized to access. The vulnerability was fixed in versions 4.17.8 and 5.9.14. The CVSS score is 4.3, indicating a medium severity impact.

References

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