Liferay DXP Improper Authentication Vulnerability - CVE-2021-29047
The SimpleCaptcha implementation in Liferay Portal 7.3.4 7.3.5 and Liferay DXP 7.3 before fix pack 1 does not invalidate CAPTCHA answers after it is used which allows remote attackers to repeatedly perform actions protected by a CAPTCHA challenge by reusing the same CAPTCHA answer.