CVSS: 8.8EPSS: 0%CPEs: 5EXPL: 0CVE-2021-32679 – Filenames not escaped by default in controllers using DownloadResponse
https://notcve.org/view.php?id=CVE-2021-32679
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.0.11, and 21.0.3, filenames where not escaped by default in controllers using `DownloadResponse`. When a user-supplied filename was passed unsanitized into a `DownloadResponse`, this could be used to trick users into downloading malicious files with a benign file extension. This would show in UI behaviours where Nextcloud applications would display a benign file extension (e.g. JPEG), but the file will actually be downloaded with an executable file extension. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3hjp-26x8-mhf6 https://github.com/nextcloud/server/pull/27354 https://hackerone.com/reports/1215263 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ https://security.gentoo.org/glsa/202208-17 • CWE-116: Improper Encoding or Escaping of Output •
CVSS: 5.3EPSS: 0%CPEs: 5EXPL: 0CVE-2021-32678 – Ratelimit not applied on OCS API responses
https://notcve.org/view.php?id=CVE-2021-32678
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.0.11, and 21.0.3, ratelimits are not applied to OCS API responses. This affects any OCS API controller (`OCSController`) using the `@BruteForceProtection` annotation. Risk depends on the installed applications on the Nextcloud Server, but could range from bypassing authentication ratelimits or spamming other Nextcloud users. The vulnerability is patched in versions 19.0.13, 20.0.11, and 21.0.3. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48rx-3gmf-g74j https://github.com/nextcloud/server/pull/27329 https://hackerone.com/reports/1214158 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ https://security.gentoo.org/glsa/202208-17 • CWE-307: Improper Restriction of Excessive Authentication Attempts CWE-799: Improper Control of Interaction Frequency •
CVSS: 9.8EPSS: 0%CPEs: 5EXPL: 0CVE-2021-22915
https://notcve.org/view.php?id=CVE-2021-22915
Nextcloud server before 19.0.11, 20.0.10, 21.0.2 is vulnerable to brute force attacks due to lack of inclusion of IPv6 subnets in rate-limiting considerations. This could potentially result in an attacker bypassing rate-limit controls such as the Nextcloud brute-force protection. Nextcloud server versiones anteriores a 19.0.11, 20.0.10 y 21.0.2, es vulnerable a ataques de fuerza bruta debido a una falta de inclusión de subredes IPv6 en las consideraciones de limitación de velocidad. Esto podría potencialmente resultar en que un atacante omita los controles de limitación de velocidad, como la protección de fuerza bruta de Nextcloud • https://hackerone.com/reports/1154003 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AGXGR6HYGQ6MZXISMJEHCOXRGRFRUFMA https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S https://nextcloud.com/security/advisory/?id=NC-SA-2021-009 • CWE-307: Improper Restriction of Excessive Authentication Attempts •
CVSS: 4.3EPSS: 0%CPEs: 3EXPL: 0CVE-2021-32657 – Malicious user could break user administration page
https://notcve.org/view.php?id=CVE-2021-32657
Nextcloud Server is a Nextcloud package that handles data storage. In versions of Nextcloud Server prior to 10.0.11, 20.0.10, and 21.0.2, a malicious user may be able to break the user administration page. This would disallow administrators to administrate users on the Nextcloud instance. The vulnerability is fixed in versions 19.0.11, 20.0.10, and 21.0.2. As a workaround, administrators can use the OCC command line tool to administrate the Nextcloud users. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fx62-q47f-f665 https://hackerone.com/reports/1147611 https://security.gentoo.org/glsa/202208-17 • CWE-400: Uncontrolled Resource Consumption •
CVSS: 8.6EPSS: 0%CPEs: 3EXPL: 0CVE-2021-32656 – Trusted servers exchange can be triggered by attacker
https://notcve.org/view.php?id=CVE-2021-32656
Nextcloud Server is a Nextcloud package that handles data storage. A vulnerability in federated share exists in versions prior to 19.0.11, 20.0.10, and 21.0.2. An attacker can gain access to basic information about users of a server by accessing a public link that a legitimate server user added as a federated share. This happens because Nextcloud supports sharing registered users with other Nextcloud servers, which can be done automatically when selecting the "Add server automatically once a federated share was created successfully" setting. The vulnerability is patched in versions 19.0.11, 20.0.10, and 21.0.2 As a workaround, disable "Add server automatically once a federated share was created successfully" in the Nextcloud settings. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j875-vr2q-h6x6 https://hackerone.com/reports/1167853 https://security.gentoo.org/glsa/202208-17 • CWE-284: Improper Access Control •