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Advisories

Craft CMS 5.10.0 before 5.11.2 RCE via app/render-elements Signing Oracle

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Severity
high
Date
Affecting

  • cms >= 5.10.0, < 5.11.2

CWE
  • CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
0xkalawy
Description
Craft CMS from 5.10.0 before 5.11.2 contains a remote code execution vulnerability that allows non-administrator control panel users to obtain HMAC-signed Twig templates via the app/render-elements endpoint. Attackers can submit the signed templated returnUrl as the login redirect parameter, triggering unsandboxed renderObjectTemplate() evaluation and executing OS commands as the PHP worker.

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