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

CESA-2023:0046 Important CentOS 7 xorg-x11-server Security Update

CentOS Errata and Security Advisory 2023:0046 Important

Upstream details at :   https://access.redhat.com/errata/RHSA-2023:0046

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

x86_64:
50b46cc6de592b1b49fec6ba38878c1a368940c367309a46433e7015b68a5184 xorg-x11-server-common-1.20.4-21.el7_9.x86_64.rpm
e23ad6387e0d97dd5a8214f1c20a8112b68c12124bedabc0dd60ef5e8397681a xorg-x11-server-devel-1.20.4-21.el7_9.i686.rpm
26770336a22190354f2629a10f4c6c2d42e78462a5b8b78e24159743658c844b xorg-x11-server-devel-1.20.4-21.el7_9.x86_64.rpm
6f027d48513d5431e3da6ea4365a8f77b28f4a40c5d6c2552a5ab6817c5a1c2f xorg-x11-server-source-1.20.4-21.el7_9.noarch.rpm
7244017a6987e7001fb62931332183a4f84646b24773d5ba2acf5c799d15b1fa xorg-x11-server-Xdmx-1.20.4-21.el7_9.x86_64.rpm
0607eb87b1e4a72aa8d10708247befdd19963e0ca5b2fe44d7d76eda6a408652 xorg-x11-server-Xephyr-1.20.4-21.el7_9.x86_64.rpm
f31fd03961b259ff05fa33eb46e64b8dfb29cd1193b459d1721e424ea9616d10 xorg-x11-server-Xnest-1.20.4-21.el7_9.x86_64.rpm
1a57399b3dc42160f3044e768ceb0aa76dee84a8c852b6e9c99ec3568e52eedd xorg-x11-server-Xorg-1.20.4-21.el7_9.x86_64.rpm
43a65f36dfe6af5466184f30652144e3c9c8793fa34ed3f819d2d654e01edac9 xorg-x11-server-Xvfb-1.20.4-21.el7_9.x86_64.rpm
9bfa69b7940e4e41942fffc935239c974893faa573fe45c923cc53905317aad3 xorg-x11-server-Xwayland-1.20.4-21.el7_9.x86_64.rpm

Source:
9d2c89aad69c6cb350c97d51d69dd0b52c7b1b5f5dc2ae3fe1b4108ba9d4b883 xorg-x11-server-1.20.4-21.el7_9.src.rpm