{"data":{"id":"7aa70e7c-54a5-4b05-ab5d-4d08d70520a2","title":"Security Advisory: Anthropic's Slack MCP Server Vulnerable to Data Exfiltration","summary":"Anthropic's Slack MCP Server (a tool that lets AI agents interact with Slack) has a vulnerability where it doesn't disable link unfurling, a feature that automatically previews hyperlinks in messages. An attacker can use prompt injection (tricking an AI by hiding instructions in its input) to make an AI agent post a malicious link to Slack, which then leaks sensitive data like API keys to the attacker's server when Slack's systems automatically fetch the preview.","solution":"N/A -- no mitigation discussed in source.","labels":["security","safety"],"sourceUrl":"https://embracethered.com/blog/posts/2025/security-advisory-anthropic-slack-mcp-server-data-leakage/","publishedAt":"2025-06-24T23:00:46.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"high","attackType":["prompt_injection","data_extraction"],"issueType":"news","affectedPackages":null,"affectedVendors":["Anthropic"],"affectedVendorsRaw":["Anthropic","Claude","Slack MCP Server"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"patchAvailable":null,"disclosureDate":null,"capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["confidentiality","integrity"],"aiComponentTargeted":"agent","llmSpecific":true,"classifierConfidence":0.92,"researchCategory":null,"atlasIds":null}}