This is commonly stated on the web without support. X11 is updated and currently maintained. The misconception probably stems from that X11 receives updates with bug patches but no new major releases that bring new features.
Not only is Xorg active - they are the very group doing Wayland.
Just like above.
Wayland has security issues.
Everything has security issues.
Yes, security concerns were raised about X11 windowing and input events - which have also been addressed and patched - because as noted above - Xorg are active:
October 29, 2024:
- vulnerability in the
_XkbSetCompatMapfunction, identified as CVE-2024-9632. This vulnerability could potentially allow privilege escalation. The issue has been addressed in xwayland 24.1.4 and xorg-server 21.1.14.
April 3, 2024:
- CVE-2024-31080: Heap buffer overread/data leakage in
ProcXIGetSelectedEvents. - CVE-2024-31081: Heap buffer overread/data leakage in
ProcXIPassiveGrabDevice. - CVE-2024-31082: Heap buffer overread/data leakage in
ProcAppleDRICreatePixmap. - CVE-2024-31083: Use-after-free in
ProcRenderAddGlyphs.These vulnerabilities have been fixed in xwayland 23.2.5 and xorg-server 21.1.12. Notably, the fix for CVE-2024-31083 introduced a regression, which was subsequently resolved in xwayland 23.2.6 and xorg-server 21.1.13.
January 16, 2024:
- CVE-2023-6816: Heap buffer overflow in
DeviceFocusEventandProcXIQueryPointer.
= CVE-2024-0229: Reattaching to a different master device may lead to out-of-bounds memory access.
= CVE-2024-21885: Heap buffer overflow inXISendDeviceHierarchyEvent.
= CVE-2024-21886: Heap buffer overflow inDisableDevice.
= CVE-2024-0409: SELinux context corruption.
CVE-2024-0408: SELinux unlabeled GLX PBuffer.