An MCP server that connects AI assistants to Zoho Mail, enabling reading, searching, sending, scheduling, organizing, and downloading emails through the official Zoho Mail REST API.
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agustif
Source: Glama
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
ZOHO_ACCOUNT_EMAILNo Select an account by primary address or alias (single-mailbox mode)ZOHO_ACCOUNT_IDNo Select a specific accessible account ID (single-mailbox mode)ZOHO_CLIENT_IDyour_id ZOHO_CLIENT_SECRET=your_secret ZOHO_REFRESH_TOKEN=your_token bun run setup.ts --verifyZOHO_CLIENT_SECRETZOHO_CLIENT_ID=your_id =your_secret ZOHO_REFRESH_TOKEN=your_token bun run setup.ts --verifyZOHO_DATACENTERNo Zoho datacenter: eu (default), us, in, au, jp, ca, sa, or ukZOHO_DEFAULT_MAILBOXNo Default profile name when tools omit mailboxZOHO_MAILBOXESNo Multi-mailbox JSON array or comma list of names (see below)ZOHO_REFRESH_TOKENZOHO_CLIENT_ID=your_id ZOHO_CLIENT_SECRET=your_secret =your_token bun run setup.ts --verifyTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
15/15 tools missing one or more hints — list_accounts (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_folders (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); manage_folder (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +12 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
Only 0/15 tool handlers declare input schemas (0%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool test coverage
Only 0/15 tools referenced in tests (0%)
Write tests that reference each tool by name so every tool has at least one test.
Secrets stay with their owner
3 secret/sensitive values flow into network calls (ZOHO_CLIENT_SECRET → dynamic, ZOHO_CLIENT_SECRET → dynamic)
Audit where credentials are sent. A NOTION_TOKEN should only reach api.notion.com — never a third-party host.
Secrets not logged
6 secret values sent to console.log
Redact or omit secret values from log output.
Production dependencies are patched
0 critical, 3 high severity in production deps — @modelcontextprotocol/sdk@1.12.1 (high), @modelcontextprotocol/sdk@1.12.1 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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