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Latest commit 9a33d89 Feb 22, 2020


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Failed to load latest commit information. Fix wrong version order Feb 22, 2020

PHP 7.0-7.4 disable_functions bypass

This exploit uses a two year old bug in debug_backtrace() function. We can trick it into returning a reference to a variable that has been destroyed, causing a use-after-free vulnerability. The PoC was tested on various php builds for Debian/Ubuntu/CentOS/FreeBSD with cli/fpm/apache2 server APIs and found to work reliably.


  • 7.0 - all versions to date
  • 7.1 - all versions to date
  • 7.2 - all versions to date
  • 7.3 < 7.3.15 (released 20 Feb 2020)
  • 7.4 < 7.4.3 (released 20 Feb 2020)
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