CVSS: 10.0EPSS: 0%CPEs: 3EXPL: 0CVE-2021-32802 – Preview generation used third-party library not suited for user-generated content in Nextcloud server
https://notcve.org/view.php?id=CVE-2021-32802
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: 0CVE-2021-32801 – Exceptions may have logged Encryption-at-Rest key content in Nextcloud server
https://notcve.org/view.php?id=CVE-2021-32801
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: 0CVE-2021-32800 – Bypass of Two Factor Authentication in Nextcloud server
https://notcve.org/view.php?id=CVE-2021-32800
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 •
CVSS: 5.3EPSS: 0%CPEs: 3EXPL: 0CVE-2021-32766 – Nextcloud Text app can disclose existence of folders in "File Drop" link share
https://notcve.org/view.php?id=CVE-2021-32766
Nextcloud Text is an open source plaintext editing application which ships with the nextcloud server. In affected versions the Nextcloud Text application returned different error messages depending on whether a folder existed in a public link share. This is problematic in case the public link share has been created with "Upload Only" privileges. (aka "File Drop"). A link share recipient is not expected to see which folders or files exist in a "File Drop" share. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gcf3-3wmc-88jr https://github.com/nextcloud/text/pull/1716 https://hackerone.com/reports/1253475 • CWE-209: Generation of Error Message Containing Sensitive Information •
CVSS: 5.3EPSS: 0%CPEs: 3EXPL: 0CVE-2021-32741 – Lack of ratelimit on public share link mount endpoint
https://notcve.org/view.php?id=CVE-2021-32741
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the public share link mount endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-crvj-vmf7-xrvr https://github.com/nextcloud/server/pull/26958 https://hackerone.com/reports/1192144 • CWE-799: Improper Control of Interaction Frequency •