Pattern Redirects in Liferay Portal 7.4.3.48 through 7.4.3.76, and Liferay DXP 7.4 update 48 through 76 allows regular expressions that are vulnerable to ReDoS attacks to be used as patterns, which allows remote attackers to consume an excessive amount of server resources via crafted request URLs.

The Object module in Liferay Portal 7.4.3.4 through 7.4.3.48, and Liferay DXP 7.4 before update 49 does properly isolate objects in difference virtual instances, which allows remote authenticated users in one virtual instance to view objects in a different virtual instance via OAuth 2 scope administration page.