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Improper access control allows injecting tasks into other users decks (NC-SA-2020-022)

15th May 2020

Risk level: Low

CVSS v3 Base Score: 4.1 (AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N)

CWE: Improper Access Control - Generic (CWE-284)

HackerOne report: 867052


Improper access control in Nextcloud Deck 1.0.0 allowed an attacker to inject tasks into other users decks.

Affected Software

  • Nextcloud Deck < 1.0.1 (CVE-2020-8179)

Action Taken

The error has been fixed.


It is recommended that the Nextcloud Deck is upgraded to 1.0.1.


The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory:

  • Remco Sprooten - Sector52 ( - Vulnerability discovery and disclosure.

This advisory is licensed CC BY-SA 4.0.

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