The PHP development team announces the immediate availability of PHP 5.6.33. This is a security release. Several security bugs were fixed in this release. All PHP 5.6 users are encouraged to upgrade to this version.

Version 5.6.33
04 Jan 2018

GD:
Fixed bug #75571 (Potential infinite loop in gdImageCreateFromGifCtx).

Phar:
Fixed bug #74782 (Reflected XSS in .phar 404 page).