Incorrect Ownership Assignment

The product assigns an owner to a resource, but the owner is outside of the intended control sphere.

CVEs (22)

CVE VENDORS PRODUCTS UPDATED PUBLISHED CVSS
CVE-2021-32726 1Nextcloud 1Nextcloud Server Jun 17, 2026 Jul 12, 2021 N/A· v4 9.8 CRITICAL· v3 7.5 HIGH· v2 Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, webauthn tokens were not deleted after a user has been deleted. If a victim reused an earlier used user...Show more Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, webauthn tokens were not deleted after a user has been deleted. If a victim reused an earlier used username, the previous user could gain access to their account. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.Show less
CVE-2021-32689 1Nextcloud 1Talk Jun 17, 2026 Jul 12, 2021 N/A· v4 6.5 MEDIUM· v3 4.0 MEDIUM· v2 Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a user was able to reuse an earlier used username, they could get access to any chat message sent to the p...Show more Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a user was able to reuse an earlier used username, they could get access to any chat message sent to the previous user with this username. The issue was patched in versions 11.2.2 and 11.3.0. As a workaround, don't allow users to choose usernames themselves. This is the default behaviour of Nextcloud, but some user providers may allow doing so.Show less

CVE

VENDORS

PRODUCTS

UPDATED

PUBLISHED

CVSS

CVE-2021-32726

1Nextcloud

1Nextcloud Server

Jun 17, 2026

Jul 12, 2021

N/A· v4

9.8 CRITICAL· v3

7.5 HIGH· v2

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, webauthn tokens were not deleted after a user has been deleted. If a victim reused an earlier used username, the previous user could gain access to their account. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.Show less

CVE-2021-32689

1Nextcloud

1Talk

Jun 17, 2026

Jul 12, 2021

N/A· v4

6.5 MEDIUM· v3

4.0 MEDIUM· v2

Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a user was able to reuse an earlier used username, they could get access to any chat message sent to the previous user with this username. The issue was patched in versions 11.2.2 and 11.3.0. As a workaround, don't allow users to choose usernames themselves. This is the default behaviour of Nextcloud, but some user providers may allow doing so.Show less

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