CVE-2022-39334

Summary

Nextcloud also ships a CLI utility called nextcloudcmd which is sometimes used for automated scripting and headless servers. Versions of nextcloudcmd prior to 3.6.1 would incorrectly trust invalid TLS certificates, which may enable a Man-in-the-middle attack that exposes sensitive data or credentials to a network attacker. This affects the CLI only. It does not affect the standard GUI desktop Nextcloud clients, and it does not affect the Nextcloud server.

Affected Software

Weaknesses

• CWE-295: CWE-295: Improper Certificate Validation

ADP Enrichment

CVE Program Container

Additional References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-82xx-98xv-4jxv
• https://github.com/nextcloud/desktop/issues/4927
• https://github.com/nextcloud/desktop/pull/5022
• https://hackerone.com/reports/1699740
• https://lists.debian.org/debian-lts-announce/2025/09/msg00018.html

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-82xx-98xv-4jxv
• https://github.com/nextcloud/desktop/issues/4927
• https://github.com/nextcloud/desktop/pull/5022
• https://hackerone.com/reports/1699740

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