Apache Tomcat Improper Encoding or Escaping of Output Vulnerability - CVE-2021-30640
A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protection provided by the LockOut Realm. This issue affects Apache Tomcat 10.0.0-M1 to 10.0.5 9.0.0.M1 to 9.0.45 8.5.0 to 8.5.65.