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CVSS: 5.3EPSS: 0%CPEs: 3EXPL: 0

Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It is recommended that the Nextcloud Server is upgraded to 20.0.14, 21.0.6 or 22.2.1. There are no known workarounds. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g722-cm3h-8wrx https://github.com/nextcloud/server/issues/27122 https://github.com/nextcloud/server/pull/29260 https://security.gentoo.org/glsa/202208-17 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE-862: Missing Authorization •

CVSS: 8.1EPSS: 0%CPEs: 3EXPL: 0

Nextcloud is an open-source, self-hosted productivity platform. Prior to versions 20.0.13, 21.0.5, and 22.2.0, Nextcloud Server did not implement a database backend for rate-limiting purposes. Any component of Nextcloud using rate-limits (as as `AnonRateThrottle` or `UserRateThrottle`) was thus not rate limited on instances not having a memory cache backend configured. In the case of a default installation, this would notably include the rate-limits on the two factor codes. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5, or 22.2.0. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fj39-4qx4-m3f2 https://github.com/nextcloud/server/pull/28728 https://hackerone.com/reports/1265709 https://security.gentoo.org/glsa/202208-17 • CWE-799: Improper Control of Interaction Frequency •

CVSS: 10.0EPSS: 0%CPEs: 3EXPL: 0

Nextcloud server is an open source, self hosted personal cloud. Nextcloud supports rendering image previews for user provided file content. For some image types, the Nextcloud server was invoking a third-party library that wasn't suited for untrusted user-supplied content. There are several security concerns with passing user-generated content to this library, such as Server-Side-Request-Forgery, file disclosure or potentially executing code on the system. The risk depends on your system configuration and the installed library version. • https://docs.nextcloud.com/server/21/admin_manual/configuration_files/previews_configuration.html#disabling-previews https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m682-v4g9-wrq7 https://hackerone.com/reports/1261413 https://security.gentoo.org/glsa/202208-17 • CWE-829: Inclusion of Functionality from Untrusted Control Sphere •

CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0

Nextcloud server is an open source, self hosted personal cloud. In affected versions logging of exceptions may have resulted in logging potentially sensitive key material for the Nextcloud Encryption-at-Rest functionality. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. If upgrading is not an option users are advised to disable system logging to resolve this issue until such time that an upgrade can be performed Note that ff you do not use the Encryption-at-Rest functionality of Nextcloud you are not affected by this bug. El servidor Nextcloud es una nube personal de código abierto y autoalojada. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-mcpf-v65v-359h https://github.com/nextcloud/server/pull/28082 https://hackerone.com/reports/1251776 https://security.gentoo.org/glsa/202208-17 • CWE-532: Insertion of Sensitive Information into Log File •

CVSS: 8.1EPSS: 0%CPEs: 3EXPL: 0

Nextcloud server is an open source, self hosted personal cloud. In affected versions an attacker is able to bypass Two Factor Authentication in Nextcloud. Thus knowledge of a password, or access to a WebAuthN trusted device of a user was sufficient to gain access to an account. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. There are no workaround for this vulnerability. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gv5w-8q25-785v https://github.com/nextcloud/server/pull/28078 https://hackerone.com/reports/1271052 https://security.gentoo.org/glsa/202208-17 • CWE-306: Missing Authentication for Critical Function •