WebKit in Apple iOS before 9.3 does not prevent hidden web views from reading orientation and motion data, which allows remote attackers to obtain sensitive information about a device's physical environment via a crafted web site.
http://lists.apple.com/archives/security-announce/2016/Mar/msg00000.html
Source: MITRE
Published: 2016-03-24
Updated: 2016-12-03
Type: CWE-200
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 4.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Impact Score: 1.4
Exploitability Score: 2.8
Severity: MEDIUM