A Slack integration is a connection between an application and Slack that lets events, alerts, or records flow into channels, direct messages, or workflow automations. Common examples include incident alerts, support tickets, HR notifications, and CI/CD status updates. These integrations are useful because they bring work into a shared chat space, but they also expand the sensitive-data surface.
In cyber security, Slack integrations matter because any data sent to Slack may be copied into message history, bot logs, exports, backups, and third-party apps. Attackers can abuse overly broad OAuth permissions, stolen webhook URLs, or compromised bots to exfiltrate data or deliver convincing phishing messages. Defenders reduce risk by limiting scopes, reviewing installed apps, filtering sensitive fields, using least-privilege access, and auditing where automated messages are sent. The key rule is simple: if an app can post into Slack, treat that path as a data exposure channel.