A logic issue was addressed with improved validation. This issue is fixed in iOS 12.2, Safari 12.1. Enabling the Safari Reader feature on a maliciously crafted webpage may lead to universal cross site scripting.
https://support.apple.com/HT209603
https://support.apple.com/HT209599
Source: Mitre, NVD
Published: 2019-12-18
Updated: 2019-12-31
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N