You can also check using Magento's API using the following request from the terminal:

$ curl https://magento.com/security-patch-check/{domain}/{admin path}

Optionally, you can force the API to check in https mode:

$ curl https://magento.com/security-patch-check/{domain}/{admin path}/https

You will get something like this

{"status":"ok","message":"SAFE: This site appears to be safe."}

OR

{"status":"warning","message":"WARNING: This site appears to be vulnerable. Please patch it immediately!"}

source: http://magento.com/security-patch

You can also check this patch installation using Magento's API. Just type the following request on a terminal window:

$ curl https://magento.com/security-patch-check/{domain}/{admin path}

Optionally, you can force the API to check in https mode:

$ curl https://magento.com/security-patch-check/{domain}/{admin path}/https

You will get something like this

{"status":"ok","message":"SAFE: This site appears to be safe."}

OR

{"status":"warning","message":"WARNING: This site appears to be vulnerable. Please patch it immediately!"}

source: http://magento.com/security-patch