This update for php53 fixes the following issues: Security issues fixed: - CVE-2018-10545: Fix access controls in FPM child processes . - CVE-2018-10547: Fix Reflected XSS on the PHAR 403 and 404 error pages . - CVE-2018-10546: Fix an infinite loop exists in ext/iconv/iconv.c . - CVE-2018-10548: Fix remote denial of service in ext/ldap/ldap.c .