"Clear History and Website Data" did not clear the history. The issue was addressed with improved data deletion. This issue affected versions prior to iOS 12.1.1, Safari 12.0.2.
https://support.apple.com/kb/HT209344
https://support.apple.com/kb/HT209340
Source: Mitre, NVD
Published: 2019-04-03
Updated: 2019-04-05
Base Score: 4
Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N
Severity: Medium
Base Score: 4.3
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N