CVE-2020-25697: X.org X Server

High severity, CVSS 7.0. EPSS: 0.3% chance of exploitation in the next 30 days.

A privilege escalation flaw was found in the Xorg-x11-server due to a lack of authentication for X11 clients. This flaw allows an attacker to take control of an X application by impersonating the server it is expecting to connect to.

Affected products

• X.org X Server: affected versions not specified

Published 2021-05-26. Last modified 2026-06-17.