Softeria/ms-365-mcp-server
A Model Context Protocol (MCP) server for interacting with Microsoft 365 and Office services through the Graph API
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Softeria
Source: npm · also listed on mcp.so, modelscope
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
JS-YAML: Quadratic-complexity DoS in merge key handling via repeated aliases
js-yaml has prototype pollution in merge (<<)
ENABLED_TOOLSFilter tools using a regex pattern (alternative to --enabled-tools flag)LOG_LEVELSet logging level (default: 'info')MS365_MCP_ALLOWED_REDIRECT_URISMS365_MCP_ALLOWED_SCOPESMS365_MCP_ALLOW_PAGINATIONMS365_MCP_ALLOW_UNAUTHENTICATED_DISCOVERYMS365_MCP_AUDIT_LOGMS365_MCP_BASE_URLMS365_MCP_BODY_FORMAThtml: Return email bodies as HTML instead of plain text (default: text)MS365_MCP_CLIENT_IDyour-azure-ad-app-client-id-hereMS365_MCP_CLIENT_SECRETyour-secret-here # Optional for public appsMS365_MCP_CLOUD_TYPEglobalchina: Microsoft cloud environment (alternative to --cloud flag)MS365_MCP_CORS_ORIGINMS365_MCP_EXPECTED_HOME_ACCOUNT_IDCLI values (--expected-username, --expected-home-account-id) take precedence over MS365_MCP_EXPECTED_USERNAME and .MS365_MCP_EXPECTED_USERNAMEwork@company.com npx @softeria/ms-365-mcp-server --loginMS365_MCP_EXTRA_SCOPESMS365_MCP_FORCE_WORK_SCOPEStrue1: Backwards compatibility for MS365_MCP_ORG_MODEMS365_MCP_GRAPH_CIRCUIT_DISABLEDMS365_MCP_KEYVAULT_URLAzure Key Vault URL for secrets management (see Azure Key Vault section)MS365_MCP_LOG_DIRMS365_MCP_MAX_TOPn>: Hard cap for Graph $top / top on list requests (positive integer). When the model passes a larger value, the server clamps it to n so responses stay smaller. Example: MS365_MCP_MAX_TOP=15MS365_MCP_OAUTH_TOKENyour_oauth_token npx @softeria/ms-365-mcp-serverMS365_MCP_OBOMS365_MCP_ORG_MODEtrue1: Enable organization/work mode (alternative to --org-mode flag)MS365_MCP_OUTPUT_FORMATtoon npx @softeria/ms-365-mcp-serverMS365_MCP_PUBLIC_URLMS365_MCP_RATE_LIMIT_DISABLEDtrue1: Disable per-IP rate limiting in HTTP mode (default: enabled — 30 req/min on /authorize, /token, /register; 120 req/min on /mcp)MS365_MCP_REDACT_PIIMS365_MCP_SELECTED_ACCOUNT_PATHCustom file path for selected account metadata (see Token Storage below)MS365_MCP_TENANT_IDms365-mcp-tenant-id No (defaults to 'common')MS365_MCP_TOKEN_CACHE_PATHCustom file path for MSAL token cache (see Token Storage below)MS365_MCP_TRUST_PROXY_AUTHMS365_MCP_TRUST_PROXY_HOPSREAD_ONLYtrue1: Alternative to --read-only flagSILENTtrue1: Disable console outputVITESTTool annotations
4/9 tools have annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
9/9 tools missing one or more hints — login (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); logout (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); verify-login (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +6 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool inputs are validated
6/9 tool handlers declare input schemas (67%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
7/9 tool handlers wrap calls in try/catch (78%)
Wrap each tool handler body in try/catch and return a structured error response.
Tool test coverage
7/9 tools referenced in tests (78%)
Write tests that reference each tool by name so every tool has at least one test.
Shell command execution
1 child_process call — runs shell commands
Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.
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