CVE-2025-64408

Apache Causeway faces Java deserialization vulnerabilities that allow remote code execution (RCE) through user-controllable URL parameters. These vulnerabilities affect all applications using Causeways ViewModel functionality and can be exploited by authenticated attackers to execute arbitrary code with application privileges. 

This issue affects all current versions.

Users are recommended to upgrade to version 3.5.0, which fixes the issue.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Potential Mitigations

• Make fields transient to protect them from deserialization.
• An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/586.html

References

• https://lists.apache.org/thread/rjlg4spqhmgy1xgq9wq5h2tfnq4pm70b
• http://www.openwall.com/lists/oss-security/2025/11/19/1