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    Slack

    Slack

    Productivity

    Enterprise messaging platform connecting teams with channels, integrations, and workflow automation tools.

    https://slack.com

    Max Reward

    $10,000

    Total Paid

    $2,100,000

    Resolved

    312

    Avg Response

    2 days

    In-Scope Assets

    slack.com

    Web client, workspace management, and admin tools

    Slack API

    Web API, Events API, and RTM

    Slack Desktop

    Desktop application

    Slack Connect

    Cross-organization messaging

    Out of Scope

    • ✕ Third-party integrations
    • ✕ Slack community forums
    • ✕ Marketing pages

    Severity Levels & Rewards

    Critical

    RCE, authentication bypass, privilege escalation, fund extraction

    High

    Stored XSS, CSRF with impact, API abuse, data manipulation

    Medium

    Reflected XSS, data leakage, logic flaws, information disclosure

    Low

    Verbose errors, minor config issues, low-impact info disclosure

    Active Bounties (1)

    IDTitleSeverityStatusRewardSubmissions
    SLK-001Message content leakage via shared channel API misconfiguration
    High
    Open
    		$3,000–$10,0000

    Rules of Engagement

    • Do not access, modify, or delete data belonging to other users.

    • Do not perform denial-of-service attacks or automated scanning at high volume.

    • Report vulnerabilities promptly and provide sufficient detail to reproduce.

    • Allow reasonable time for fix before public disclosure (90 days).

    • Safe harbor: We will not pursue legal action against researchers acting in good faith within these rules.