![]() ![]() Incoming Slack webhooks allow their users to post messages from external applications into selected Slack Channels.Ĭreating an incoming webhook on Slack generates a unique URL through which a JSON payload with a text message is sent to the intended Slack Channel. A webhook is a lightweight API used for one-way communication between different applications. Continuous monitoring of Slack OAuth applications.ĬloudSEK’s flagship application scanning platform BeVigil has detected leaked Slack webhooks in one of the applications being monitored.Apply the least privilege policy on Slack webhooks.Restrict the webhooks from Slack channels.Leaked Slack webhooks allow threat actors to send unauthorized and potentially malicious messages on Slack.Exposed webhooks can be leveraged to access sensitive data and also propagate phishing messages.Incoming webhooks are a simple way to post messages from third-party apps into Slack. ![]()
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