A xorg-x11-server bugfix update has been released for CentOS 7.

CentOS-announce: CEBA-2020:5049 CentOS 7 xorg-x11-server BugFix Update

CentOS Errata and Bugfix Advisory 2020:5049

Upstream details at :   https://access.redhat.com/errata/RHBA-2020:5049

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

x86_64:
bf404adf3b74fc2e12fa6437b1abaaa8f327ed847a1b30602af13942c9bb57d7 xorg-x11-server-common-1.20.4-13.el7_9.x86_64.rpm
518a5be8d1eae8953da4a54a8b852ce6fdf3a22ed2fd22c5b4db85cd4174a5f5 xorg-x11-server-devel-1.20.4-13.el7_9.i686.rpm
5d1ce4fa6ac4356078869027bcaf729140f2ad908b655471ba65eb396ac94887 xorg-x11-server-devel-1.20.4-13.el7_9.x86_64.rpm
c962e5dd6d3414983350e5da2de55b057477d165e891c9d963cb8eb49a7c6330 xorg-x11-server-source-1.20.4-13.el7_9.noarch.rpm
ce5ed6d89d8f493b333f990a74873904d861f5b520c9b0a8be3c6e2b614068f7 xorg-x11-server-Xdmx-1.20.4-13.el7_9.x86_64.rpm
ee2c790a3cd22b1261a5cde580d44da4c93c567104a3688cf2369009abb5d332 xorg-x11-server-Xephyr-1.20.4-13.el7_9.x86_64.rpm
4fd4ad7ed695ea67c7d6d97ea6cc730d12e1d50fb6da365945d0f6255af4bd45 xorg-x11-server-Xnest-1.20.4-13.el7_9.x86_64.rpm
6043225f18090a8529ea90341ff21d58fd2e2a85ee1c31af68145a7c070803c4 xorg-x11-server-Xorg-1.20.4-13.el7_9.x86_64.rpm
e826d4748706ca4acec7f8adad39873fcd390f7a0086ace767fbf32cfc28d3b0 xorg-x11-server-Xvfb-1.20.4-13.el7_9.x86_64.rpm
bee904f26bd404d9a8fbf3d71746543eca0b7761bcb562e0158d4282ef1ab8d4 xorg-x11-server-Xwayland-1.20.4-13.el7_9.x86_64.rpm

Source:
5d83397359ecbe73bdd50d09256eeb9c3c5f766c1ced1bef118fd4b2bbf4db90 xorg-x11-server-1.20.4-13.el7_9.src.rpm