Several vulnerabilities affecting Apache Tomcat before 6.0.45, 7.0.68, 8.0.32 and 9.0.0M3 has been released, see [1, 2, 3, 4].
Airlock WAF is not affected.
Details:
Some vulnerabilities affect the Tomcat Manager and Host Manager which is either not accessible at all or only accessible for trusted users (upstream authentication is necessary). The other vulnerabilities do not affect Airlock WAF because all add-on modules are trusted and supposed not to have malicious code.
We recommend to update back-ends running a vulnerable Apache Tomcat to the newest version in particular if any application inside Tomcat meets one of the following criteria: