STOMP over WebSocket applications may be vulnerable to a security bypass that allows an attacker to send unauthorized messages. Affected Spring Products and VersionsSpring Framework: * 6.2.0 - 6.2.11 * 6.1.0 - 6.1.23 * 6.0.x - 6.0.29 * 5.3.0 - 5.3.45 * Older, unsupported versions are also affected. MitigationUsers of affected versions should upgrade to the corresponding fixed version. Affected version(s)Fix versionAvailability6.2.x6.2.12OSS6.1.x6.1.24 Commercial https://enterprise.spring.io/ 6.0.xN/A Out of support https://spring.io/projects/spring-framework#support 5.3.x5.3.46 Commercial https://enterprise.spring.io/ No further mitigation steps are necessary. CreditThis vulnerability was discovered and responsibly reported by Jannis Kaiser.