Functional testing is a critical aspect of application development, and it plays an essential role in products being built within the Java ecosystem to ensure they meet their functional requirements and work as intended for the end user. As this method of testing is heavily based on validating “functionality” (i.e., “Does this application work the way we intend it to work?”), it is essential to utilize it throughout the development process.

We have found a new vulnerability in MySQL Connector/J (CVE-2023-21971). Oracle issued a critical path update that fixed the issue on April 18, 2023. The vulnerability was found as part of our collaboration with Google’s OSS-Fuzz.

Just recently, our open-source fuzzing engine Jazzer found an Expression DoS vulnerability in Spring (CVE-2023-20861). Now, three weeks later, Jazzer found another similar Expression DoS in the Spring framework, labeled CVE-2023-20863. This new finding has an even higher CVSS score of 7.5 (high), compared to the previous finding which came in at 5.3 (medium).