Description
WordPress Plugin Restricted Site Access is prone to a security bypass vulnerability. Exploiting this issue may allow attackers to perform otherwise restricted actions and subsequently bypass IP-based limitations in certain situations. WordPress Plugin Restricted Site Access version 7.3.1 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 7.3.2 or latest
References
https://sploitus.com/exploit?id=WPEX-ID:C03863EF-9AC9-402B-8F8D-9559C9988E2B
https://plugins.svn.wordpress.org/restricted-site-access/trunk/readme.txt