Custom Field For WP Job Manager <= 1.2 - Insecure Direct Object Reference to Sensitive Information Exposure via Shortcode

The Custom Field For WP Job Manager plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.2 via the the 'cm_fieldshow' shortcode due to missing validation on the 'job_id' user controlled key. This makes it possible for authenticated attackers, with contributor-level access and above, to expose potentially sensitive post metadata.