PHP

SSTI in PHP template engines: Twig (Symfony) filter-callback RCE and Smarty's PHP execution constructs.

1 நிமிட வாசிப்பு7 அக்., 2026 அன்று புதுப்பிக்கப்பட்டதுflorianamette1 பங்களிப்பாளர்
உங்கள் உதவியாளரிடம் கேளுங்கள் (MCP)GitHub இல் திருத்து

PHP's two common template engines both lead to code execution from a template injection, though by different routes. Twig (the default in Symfony and widely used standalone) is reached through its filter and function callbacks; Smarty exposes PHP more directly through dedicated constructs that have tightened over versions.

Detect Twig with {{7*7}} returning 49, and Smarty with {$smarty.version} echoing the version string (Smarty uses single braces, so {7*7} is not a reliable probe and may error).

Engines#

  • Twig: filter/map callbacks to system, and the historical _self registerUndefinedFilterCallback.
  • Smarty: the {php} tag and static-method constructs, with their version gating.

References#

  • Twig and Smarty documentation (sandbox, security policy)
  • PortSwigger Web Security Academy: Server-side template injection
முந்தையதுPugஅடுத்தது Smarty