Description
WordPress Plugin Quick Paypal Payments is prone to a security bypass vulnerability. Exploiting this issue may allow attackers to perform otherwise restricted actions and subsequently make unauthorized AJAX calls and access the debug logs. WordPress Plugin Quick Paypal Payments version 5.7.21 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 5.7.22 or latest
References
https://sploitus.com/exploit?id=WPEX-ID:6DAE6DCA-7474-4008-9FE5-4C62B9F12D0A
https://plugins.svn.wordpress.org/quick-paypal-payments/trunk/changelog.txt