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Advisories

Grav before 4.2.2 Remote Code Execution via Email Twig

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severity
high
date
Affecting

  • grav >= 0, < 4.2.2

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
n0tra4e
Description
The Grav Email plugin (getgrav/grav-plugin-email) before 4.2.2 renders page-editor-controlled Email action parameters as unsandboxed Twig templates. An authenticated remote user with only api.access and api.pages.write permissions can place a Twig expression in header.form.process.email.body, publish the page, and submit the form to execute an arbitrary operating-system command as the account running PHP.

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