Inexplicable notifications titled "FCM Messagess" have appeared on Android phones in the past few hours.
Countless users have received strange notifications on their Android smartphones in the past few hours. The push notifications that are sent by various apps all have the heading "FCM Messagess" and "Test Notificationsss !!!!" in the subline. In addition to Google Hangouts users, Microsoft Teams users also received the mysterious push messages on their mobile phones.
Vulnerability revealed
The notifications are likely to be related to a security flaw in Google's Firebase Cloud Messaging (FCM) platform, which apps can use to push notifications. The vulnerability was discovered by security researchers who, according to their own account, received a reward of $ 30,000 . Why the gap that has already been communicated can still be misused to send such messages is unclear.
There was speculation on the internet that other hackers wanted to try out the hole. Another - albeit unlikely - theory is that Google wants to get the problem under control in the background and tested the alleged fix without success. Apart from the annoying notifications, nothing else should have happened so far. Security experts therefore assume that the push messages are harmless and should be ignored.
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