@better-auth/cimd
Public security reports found. Newest: Better Auth has an account takeover issue via OAuth auto-link to unverified pre-registered email (2026-07-07, CVE-2026-53516).
Client ID Metadata Document plugin for Better Auth
4 incidents on file
@better-auth/cimd is distributed via npm (@better-auth/cimd); review its source code, dependencies, and requested permissions before use.
Based on public adoption and transparency signals as of Oct 24, 2026. Our opinion, not a code audit or security guarantee.
What it can access
- Local filesNo local folder access notedLOW
- Command executionNo shell command runner notedLOW
- Network reachLocal or standard API callsLOW
- CredentialsNo API token requiredLOW
- Package sourcenpm (@better-auth/cimd)PUBLIC
Inferred from this listing’s public package details and description. Check the project’s source before installing.
Install
npx -y @better-auth/cimdEverything known
1 critical incident and 3 high incidents on record. The newest is from 2026-07-07. Every report lists a fix. Check each one for the version.
4 incidents · 0 advisories · 0 news articles · 0 community threads · checked 2026-10-31
Popularity grade: A (from public signals such as stars and downloads, not a code review). Graded 2026-10-24.
Showing all 4Showing 4 incidents of 4
- IncidentBetter Auth has an account takeover issue via OAuth auto-link to unverified pre-registered email
- IncidentBetter Auth has insecure cryptographic defaults in oidcProvider: alg=none advertised and plain PKCE accepted by default
- IncidentBetter Auth has stored XSS in the auth-server origin via javascript: redirect_uri in oidc-provider and mcp
- IncidentBetter Auth: OAuth refresh-token replay via missing client authentication on oidc-provider and mcp plugins
Sources we read: OSV, GitHub Advisory Database, CISA Known Exploited Vulnerabilities, 44 security news feeds and our incident library. Last checked 2026-10-31.
About @better-auth/cimd
@better-auth/cimd is an MCP server focused on Developer tools and Data & databases: Client ID Metadata Document plugin for Better Auth.
It is published on npm as @better-auth/cimd and hosted on GitHub at better-auth/better-auth (30,444 GitHub stars, 934,736 weekly npm downloads, last repository push on 2026-10-23). Based on its public metadata, it operates with standard local or API scope without broad shell execution flags noted.
Setup
These use the package this listing points to. Check the project’s own instructions before running anything.
npm command
npx -y @better-auth/cimdMCP client config
For Claude Desktop (claude_desktop_config.json) or Cursor (.cursor/mcp.json).
{
"mcpServers": {
"cimd": {
"command": "npx",
"args": [
"-y",
"@better-auth/cimd"
]
}
}
}Why this grade
Signal-based grade (6/7 points): very widely starred on GitHub, heavily downloaded, public source code. This reflects adoption and transparency, not a code review.
Popularity and upkeep
- GitHub stars
- 30.4k
- Weekly npm downloads
- 935k
- Listing last refreshed
- 2026-10-30
These are public popularity signals, not a maintenance check. Look at the repository’s commit history and open issues.
Risks to watch for
- Dependency & version pinning: Distributed via npm (@better-auth/cimd). Pin an exact release version or commit SHA rather than floating tags so upstream updates are reviewed first.
How to lower the risk
Least-privilege permissions
- Give it access only to the specific folders, accounts or projects it needs, never your whole drive or admin account.
- Use a separate, limited API key or login just for this tool so you can switch it off without affecting anything else.
Network isolation
- Run it on a work computer or sandbox account, not one holding personal or company-sensitive data.
- If your IT team can, limit which websites and services it is allowed to contact.
Monitoring
- Check its activity history or logs weekly at first, and look at what it changed or sent.
- Turn on alerts for new logins or unusual usage on any account it connects to.
Red flags to watch for
- It asks for more access than its job requires, or prompts you to paste passwords.
- It suddenly updates with new owners, or starts contacting unfamiliar websites.
Questions
How do I install @better-auth/cimd?
Run npx -y @better-auth/cimd in your terminal, or add the server entry to your claude_desktop_config.json or .cursor/mcp.json as shown in the Setup section on this page. Full setup docs and environment variables are in github.com/better-auth/better-auth.
Are there security reports about @better-auth/cimd?
4 reports were found for this add-on in our research. Titles and dates (AgentArmorHQ incident library) are listed under Everything known on this page. @better-auth/cimd currently holds Grade A (Few risk signals) based on public adoption and transparency signals. Review the permissions and source repository before granting access to local files, shell commands, or API keys.
Is @better-auth/cimd actively maintained?
@better-auth/cimd has 30.4k GitHub stars and 935k weekly npm downloads, with its latest repository commit pushed on 2026-10-23. Our directory data was last refreshed on 2026-10-30. Check recent commit activity, release tags, and open issues at github.com/better-auth/better-auth before pinning it in production.
What are alternatives to @better-auth/cimd?
Compare @better-auth/cimd side by side with similar MCP servers in the Related tools section on this page, or browse all MCP servers on AgentArmorHQ.
README badge and team notes
Maintain or use @better-auth/cimd? Show its live grade in your GitHub README, docs site, or run a check from the terminal before you install.
GitHub README Markdown:
[](https://agentarmorhq.com/skills/better-auth-better-auth)HTML embed:
<a href="https://agentarmorhq.com/skills/better-auth-better-auth"><img src="https://agentarmorhq.com/api/badge/better-auth-better-auth" alt="AgentArmorHQ Risk Grade for @better-auth/cimd" height="20" /></a>Terminal check:
curl -fsSL https://agentarmorhq.com/api/cli | node --input-type=module - check "better-auth-better-auth"Share with your security lead
Need sign-off to use @better-auth/cimd? Copy this note for Slack, a ticket or a pull request.
### AgentArmorHQ Security Review Memo: @better-auth/cimd
- **Listing URL:** https://agentarmorhq.com/skills/better-auth-better-auth
- **Type:** App connector
- **Risk Grade:** Grade A (Few risk signals)
- **Outside Security Advisories on File:** 4
- **Public Adoption:** 30.4k GitHub stars, 935k weekly npm downloads
#### Permission & Blast-Radius Signals
- **Local files:** No local folder access noted
- **Command execution:** No shell command runner noted
- **Network reach:** Local or standard API calls
- **Credentials:** No API token required
- **Package source:** npm (@better-auth/cimd)
#### Recommended Hardened Setup
- **Command:** `npx -y --ignore-scripts @better-auth/cimd`
- **Controls:** Pin an exact version in `.mcp.json`, scope access to a single workspace folder, and use a least-privilege read-only token where supported.
_Based on public adoption and transparency signals as of Oct 24, 2026. Our opinion, not a code audit or security guarantee._Key facts
- Type
- App connector
- Publisher
- better-auth
- Source code
- github.com/better-auth/better-auth
- Install command
- npm install @better-auth/cimd
- Est. context load
- ~850 tokens / turn (~5 tool schemas, 0.43% of 200k context)
- Popularity
- 30.4k GitHub stars, 935k weekly npm downloads
- Last updated
- 2026-10-30
- Last graded
- 2026-10-24
Community
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