Escaping in the Jetpack API taxonomies endpoint

Type casting to an integer.

This vulnerability affects the following application versions:

• Jetpack 3.1
• Jetpack 3.1.1
• Jetpack 3.1.3
• Jetpack 3.1.4
• Jetpack 3.1.5
• Jetpack 3.2
• Jetpack 3.2.1
• Jetpack 3.2.3
• Jetpack 3.2.4
• Jetpack 3.2.5
• Jetpack 3.3
• Jetpack 3.3.1
• Jetpack 3.3.2
• Jetpack 3.3.4
• Jetpack 3.3.5
• Jetpack 3.3.6
• Jetpack 3.4
• Jetpack 3.4.1
• Jetpack 3.4.2
• Jetpack 3.4.3
• Jetpack 3.4.4
• Jetpack 3.4.5
• Jetpack 3.4.6