Sanitize and decode flat rate shipping method iDs.
This vulnerability affects the following application versions:
- WooCommerce 2.0.0
- WooCommerce 2.0.0-RC2
- WooCommerce 2.0.0-RC3
- WooCommerce 2.0.1
- WooCommerce 2.0.2
- WooCommerce 2.0.3
- WooCommerce 2.0.4
- WooCommerce 2.0.5
- WooCommerce 2.0.6
- WooCommerce 2.0.7
- WooCommerce 2.0.8
- WooCommerce 2.0.9
- WooCommerce 2.0.10
- WooCommerce 2.0.11
- WooCommerce 2.0.12
- WooCommerce 2.0.13
- WooCommerce 2.0.14
- WooCommerce 2.0.15
- WooCommerce 2.0.16
- WooCommerce 2.0.17
- WooCommerce 2.0.18
- WooCommerce 2.0.19
- WooCommerce 2.0.20
- WooCommerce 2.1.0
- WooCommerce 2.1.0-RC1
- WooCommerce 2.1.0-RC2
- WooCommerce 2.1.1
- WooCommerce 2.1.2
- WooCommerce 2.1.3
- WooCommerce 2.1.4
- WooCommerce 2.1.5
- WooCommerce 2.1.6
- WooCommerce 2.1.7
- WooCommerce 2.1.8