CyberRota Analysis
AI-GeneratedCraft CMS versions 4.8.0 to 4.18.5 and 5.0.0 to 5.10.12 are vulnerable due to improper handling of signed cookies, allowing authenticated, non-administrator users to manipulate redirect parameters and execute arbitrary OS commands via PHP's system() function. This high-severity vulnerability poses a significant risk to systems where password authentication is used without active two-factor authentication. Organizations using affected Craft CMS versions should prioritize patching to versions 4.18.6 or 5.10.13 to mitigate potential exploitation.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
Note: these links are listed for security research and verification purposes only.
Original NVD Description
Craft CMS 4.8.0 through 4.18.5 and 5.0.0 through 5.10.12 sign an authenticated user's attacker-controlled license-shun cookie with the same key and format used to validate signed redirect parameters, because the HMAC signature is not bound to its purpose (Yii's cookieValidationKey is derived from the same Craft securityKey used for signed request parameters). An authenticated, non-administrator user (Control Panel access is not required) can set the cookie via the license-shun endpoint and transplant the signed envelope into the redirect parameter; on a successful login, Craft validates the signature and renders the authenticated bytes as an unsandboxed Twig template, where Twig's map filter accepts a string callback and allows PHP system() to execute arbitrary operating-system commands as the web-server user. Exploitation requires an account using password authentication without active 2FA, the default request configuration, and availability of PHP system(). The issue is fixed in 4.18.6 and 5.10.13.