In Spring Framework versions 6.0.0 – 6.0.6, 5.3.0 – 5.3.25, 5.2.0.RELEASE – 5.2.22.RELEASE, and older unsupported versions, it is possible for a user to provide a specially crafted SpEL expression that may cause a denial-of-service (DoS) condition. Ref https://spring.io/security/cve-2023-20861
