CVE-2026-45155: Authorization Bypass Through User-Controlled Key

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.7 and 33.0.0 to before 33.0.1, a missing access check on API level allowed to add unknown circles by their ID directly to other circles. Since circle IDs have 62^15 complexity by...

CVE-2026-45690: Improper Authentication

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, an authentication bypass vulnerability allowed attackers with knowledge of a user's password to circumvent two-factor authentication 2FA protections...

CVE-2026-45810: Authorization Bypass Through User-Controlled Key

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 31.0.0 to before 31.0.12, and 32.0.0 to before 32.0.3, a missing check of a relation allowed authenticated users with access to any file comment, to read the content of all comments. It is recommended th...

CVE-2026-45691: Improper Authentication

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, a pre-2FA session cookie created after successful password authentication but before TOTP completion could be reused as a Bearer token to authenticat...

The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server lies in security configuration errors, which allow attackers to compromise the accessibility of protected information.

The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server is related to security configuration errors. Exploiting this vulnerability can allow an attacker to compromise the accessibility of protected information...

EUVD-2025-201451

Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server prior to 31.0.10 and 32.0.1 and Nextcloud Enterprise Server prior to 28.0.14.11, 29.0.16.8, 30.0.17.3, and 31.0.10, contacts search allowed to retrieve personal data of other users emails, names, identifiers without prop...

CVE-2025-66510: Exposure of Private Personal Information to an Unauthorized Actor

Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server prior to 31.0.10 and 32.0.1 and Nextcloud Enterprise Server prior to 28.0.14.11, 29.0.16.8, 30.0.17.3, and 31.0.10, contacts search allowed to retrieve personal data of other users emails, names, identifiers without prop...

CVE-2025-66547: Authorization Bypass Through User-Controlled Key

Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server and Enterprise Server prior to 31.0.1, non-privileged users can modify tags on files they should not have access to via bulk tagging. This vulnerability is fixed in 31.0.1...

Bypass group folder quota limit using attachment in text file

None...

The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server lies in the storage of sensitive information in unencrypted form, allowing attackers to gain access to confidential data.

The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server lies in the storage of passwords in an unencrypted form during session data. Exploiting this vulnerability can allow attackers to gain access to confidential information...

The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server lies in the lack of security measures for website structures, allowing attackers to trigger service failures.

The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server is related to the lack of protective measures for the website structure. Exploiting this vulnerability can allow a malicious actor to cause service interruptions remotely...

The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server allows attackers to gain unauthorized access to protected information, thereby enabling them to compromise the security of these systems.

The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server relates to the insecure storage of confidential information. Exploiting this vulnerability can allow an attacker to gain unauthorized access to protected information...

The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server lies in the insufficient protection of sensitive data, allowing attackers to influence privacy issues.

The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server is related to insufficient protection of sensitive data. Exploiting this vulnerability can allow attackers to influence the confidentiality of sensitive information...

The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server lies in the authentication procedures’ deficiencies, which allow attackers to disclose protected information.

The vulnerability of cloud-based software for creating and using Nextcloud Server and Nextcloud Enterprise Server is related to deficiencies in authentication procedures. Exploiting this vulnerability can allow a malicious actor, operating remotely, to disclose protected information...

CVE-2024-52517

Nextcloud Server is a self hosted personal cloud system. After storing "Global credentials" on the server, the API returns them and adds them into the frontend again, allowing to read them in plain text when an attacker already has access to an active session of a user. It is recommended that the...

CVE-2024-52515 Nextcloud Server has incomplete sanitization of SVG files allows to embed other images into previews

Nextcloud Server is a self hosted personal cloud system. After an admin enables the default-disabled SVG preview provider, a malicious user could upload a manipulated SVG file referencing paths. If the file would exist the preview of the SVG would preview the other file instead. It is recommended...

CVE-2024-52516 Nextcloud Server's shares are not removed when user is limited to share with in their groups and being removed from one of them

Nextcloud Server is a self hosted personal cloud system. When a server is configured to only allow sharing with users that are in ones own groups, after a user was removed from a group, previously shared items were not unshared. It is recommended that the Nextcloud Server is upgraded to 22.2.11 o...

Potential hash collision for background jobs could skip queuing them

None...

User password is available in memory of the PHP process

None...

PT-2024-9159 · Nextcloud +2 · Nextcloud Enterprise Server +3

Name of the Vulnerable Software and Affected Versions: Nextcloud Server versions prior to 28.0.11 Nextcloud Server versions prior to 29.0.8 Nextcloud Server versions prior to 30.0.1 Nextcloud Enterprise Server versions prior to 25.0.13.13 Nextcloud Enterprise Server versions prior to 26.0.13.9...