5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.04 Low
EPSS
Percentile
92.0%
Peter Brodersen and Alexander Klink independently reported that the default setting for SSL Client Authentication, automatically selecting a client certificate on behalf of the user, creates a potential privacy issue for users by allowing tracking through client certificates. For users who already have certificates some real-world identity information such as an email address or name may be available to web sites depending on the purpose of the certificate and its issuer.