Ping (zestyping) wrote,

The new Facebook API exposes the events that some users attend to anyone on the Internet.

To protect your privacy, mark your events "Not Attending".

Update (06:00 PDT): So far, some people have reported that their events are exposed, and some have reported that they aren't. I don't have an explanation. I've sent a note to Facebook asking them not to expose events this way.

Update (13:00 PDT): theharmonyguy commented that event lists were already exposed in the old API, as he reported in December.

Note: This post is based on my observations as an individual Facebook user, curious to know what is revealed about me through the new API. I wrote this article to help others protect their privacy, and I am also in touch with Facebook's team, who is working to fix this. Although I work for Google, this blog represents my personal views and not Google's. Thanks to everyone for your interest.

Update (23:00 PDT): The Facebook API is no longer revealing event lists for the users mentioned in this article, or any other users I've tried. Thanks to the Facebook folks for improving their stuff!

Update (May 12): Please see the new FAQ about the Facebook API Browser.


Yesterday, I discovered something strange while playing with Facebook's new Graph API: the API was showing a list of my events, and it seemed that anyone could get this list. Today, I spent a while checking to make sure I wasn't crazy.

I didn't opt in for this. I even tried setting all my Privacy Settings for maximum privacy. But Facebook is still exposing the list of events I've attended, and maybe your events too.

What can your event list say about you? Quite a bit. It might reveal your home address, your friends' home addresses, the names and groups of people you associate with, your hobbies, or your political or religious activities, for example.

Here's what the Facebook API publishes about Mark Zuckerberg's events:

Read more...Collapse )

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This is a big bug foe me!, really i see that facebook is not that good with last changes.
This is good work from you!
King regards,
I tried it, and do not get the data-rich results I see in the screenshots here. Am I missing something?
I could get no info about myself through this app except my profile pictures

Thank you!


April 30 2010, 23:05:06 UTC 10 years ago

Thank you very much for making this tool! Knowledge of how our information is published and shared is the only way we can protect ourselves from having that information used against us.
thank you so much for this tool!

i'm however getting errors. i don't know if this is what is supposed to pop up or if it's something on your end, but i figured i'd let you know just in case.
thanks again for this! :-)

for /friends:

"error": {
"type": "Exception",
"message": "(#604) Can't lookup all friends of 1782860395; can only lookup for the logged in user (100001040613184) or for pairs of users"

and for /home, /inbox, /outbox and /updates i'm getting variations of:

"error": {
"type": "Exception",
"message": "You can only access the \"home\" connection for the current user: "
This article reinforces my opinion that not having anything to do with Facebook has got to be pretty much the best decision that I've made in the last several years. I always did think that it would lead to a terrible lack of privacy and this has confirmed that. I am a fairly private person and the thought of opening my life to all and sundry is utterly distasteful. I just hope that they never get to the point of being able to intrude on the ordinary person's without that person's having signed on with them. The very idea is thoroughly horrible and is a guarantee that I'll never open myself to their access.
The only thing that showed up for me was /like stuff and my profile photo. I tried a couple of others and didn't get much else, either.


May 5 2010, 04:18:59 UTC 10 years ago

The information is STILL available to apps. This app from the ACLU demonstrated that it could see events I've attended:
It seems that you've put a great amount of time into your article and I want a lot more of these on the internet these days. Well, anyways... it certainly was very informative for me.
Hello, you site is very funny he told me to cheer up .. Merry Christmas.
Hey there

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