XQuartz 2.8.4 has been released https://www.xquartz.org. macOS 10.9 or later is required

Changes in 2.8.4 All changes in 2.8.3 plus:

Updated server to 21.1.6 to address several security issues CVE-2022-3550, CVE-2022-3551, CVE-2022-4283, CVE-2022-46340, CVE-2022-46341, CVE-2022-46342, CVE-2022-46343, and CVE-2022-46344

The XQuartz project is an open-source effort to develop a version of the X.Org X Window System that runs on macOS.