GHSA-Q2GC-GG3X-7942 Symfony XML Entity Expansion security vulnerability

Symfony 2.0.11 carried a similar XXE security fix, however, on review of ZF2 I also noted a vulnerability to XML Entity Expansion XEE attacks whereby all extensions making use of libxml2 have no defense against XEE Quadratic Blowup Attacks. The vulnerability is a function of there being no curren...