KMail since version 5.3.0 used a QWebEngine based viewer that had JavaScript enabled. Since the generated html is executed in the local file security context by default access to remote and local URLs was enabled.
http://www.securityfocus.com/bid/93360
http://www.openwall.com/lists/oss-security/2016/10/05/1
https://www.kde.org/info/security/advisory-20161006-2.txt
Source: Mitre, NVD
Published: 2016-12-23
Updated: 2025-04-12
Base Score: 5.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N
Severity: Medium
Base Score: 8.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Severity: High
EPSS: 0.00455