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<h1>Security Advisory</h1>
<a href="/security/advisories/">Back to advisories</a>
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<h2>Improper access control allows injecting tasks into other users decks (NC-SA-2020-022)</h2>
<p>15th May 2020</p>
<p>Risk level: <strong>Low</strong></p>
<p>CVSS v3 Base Score: 4.1 (<a href="https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N">AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N</a>)</p>
<p>CWE: <a href="https://cwe.mitre.org/data/definitions/284.html">Improper Access Control - Generic (CWE-284)</a></p>
<p>HackerOne report: <a href="https://hackerone.com/reports/867052">867052</a></p>
<h3>Description</h3>
<p>Improper access control in Nextcloud Deck 1.0.0 allowed an attacker to inject tasks into other users decks.</p>
<h3>Affected Software</h3>
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<li>Nextcloud Deck < <strong>1.0.1</strong> (CVE-2020-8179)</li>
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<h3>Action Taken</h3>
<p>The error has been fixed.</p>
<h3>Resolution</h3>
<p>It is recommended that the Nextcloud Deck is upgraded to 1.0.1.</p>
<h3>Acknowledgements</h3>
<p>The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory:</p>
<ul>
<li>Remco Sprooten - Sector52 (remco@sector52.nl) - Vulnerability discovery and disclosure.</li>
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<small style="color:grey">This advisory is licensed <a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.</small>
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