The GUI installation for iCal 2.1 Patch 2 disables access control for the X server using an "xhost +" command, which allows remote attackers to monitor X Windows events and gain privileges.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5752
http://www.securityfocus.com/bid/1767
http://www.osvdb.org/7213
Source: Mitre, NVD
Published: 2000-12-11
Updated: 2026-06-16
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: Critical
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.01148