SB2026060343 - Multiple vulnerabilities in Craft CMS

Description

This security bulletin contains information about 2 vulnerabilities.

1) Code Injection (CVE-ID: N/A)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to missing cleanseConfig in FieldsController::actionRenderCardPreview. A remote administrator can execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Information disclosure (CVE-ID: N/A)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote user can call assets/preview-thumb and receive preview HTML that contains a signed fallback transform link for that private asset.

Remediation

Install update from vendor's website.

References

• https://github.com/craftcms/cms/security/advisories/GHSA-86vw-x4ww-x467
• https://github.com/craftcms/cms/security/advisories/GHSA-x76w-8c62-48mg