CVE-2020-25697

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-05-26 · updated 2026-06-17
Weakness: CWE-306

Description

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

xorg-x11-server: all versions

References

http://www.openwall.com/lists/oss-security/2020/11/09/3
http://www.openwall.com/lists/oss-security/2020/11/09/3
http://www.openwall.com/lists/oss-security/2020/11/09/3
http://www.openwall.com/lists/oss-security/2020/11/09/3
https://bugzilla.redhat.com/show_bug.cgi?id=1895295
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
https://seclists.org/oss-sec/2020/q4/105
http://www.openwall.com/lists/oss-security/2020/11/09/3
http://www.openwall.com/lists/oss-security/2020/11/09/3
http://www.openwall.com/lists/oss-security/2020/11/09/3
http://www.openwall.com/lists/oss-security/2020/11/09/3
https://bugzilla.redhat.com/show_bug.cgi?id=1895295

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