I usually just ignore security warnings, but this one is pretty serious...

The Vulnerability:

Any app on affected devices that requests a single android.permission.INTERNET (which is normal for any app that connects to the web or shows ads) can get its hands on:

• the list of user accounts, including email addresses and sync status for each
  last known network and GPS locations and a limited previous history of locations
  phone numbers from the phone log
• SMS data, including phone numbers and encoded text (not sure yet if it's possible to decode it, but very likely)
• system logs (both kernel/dmesg and app/logcat), which includes everything your running apps do and is likely to include email addresses, phone numbers, and other private info

Affected Phones

EVO 4G
EVO 3D
EVO Shift 4G
View 4G

What to do?

Not much can be done without a patch from HTC. If you rooted, immediately remove Htcloggers (/system/app/HtcLoggers.apk)

Don't install and remove suspicious apps.

Massive Security Vulnerability In HTC Android Devices (EVO 3D, 4G, Thunderbolt, Others) Exposes Phone Numbers, GPS, SMS, Emails Addresses, Much More