Google Dork:inurl:wp-content/plugins/gift
This google dork lists out Advisories and Vulnerabilities regarding all
plugins for the gift card and gift vouchers pages.
Ref:
1.WordPress Plugin Gift Voucher 1.0.5 - (Authenticated) 'template_id' SQL
Injection
https://www.exploit-db.com/exploits/45255
2.WooCommerce Smart Coupons < 4.6.5 - Unauthenticated Coupon Creation
https://wpvulndb.com/vulnerabilities/10109
3. Gift Certificate Creator