Nextcloud: The email API to test email-server settings is unlimited and can be used as a email bomb

Description: The email-server settings test function in https://demo.nextcloud.com/xxx/settings/admin/additional is unlimited and can be used as a email bomb. And the test email API is https://demo.nextcloud.com/xxx/settings/admin/mailtest Reproduce steps: 1.Go to...

Nextcloud: The email API to reset password is unlimited and can be used as a email bomb

Description: The email API https://demo.nextcloud.com/qazxsw/lostpassword/email to reset password is unlimited and can be used as a email bomb Reproduce steps: 1.Every Instant trial's link is https://demo.nextcloud.com/yourname,and it always has a default user admin 2.then I try to visit one...

Nextcloud: Content Spoofing/Text Injection in https://demo.nextcloud.com

Greetings, Hello Team, I have found a Content Spoofing/Text Injection on this domain https://demo.nextcloud.com PoC URL:https://demo.nextcloud.com/wp-content/cache/minify/%0d%0ahas%20moved%20to%20www.attacker.com.Please%20visit%20attacker.com%20present%20resource PoC Screen Shot: Let me know if y...

Nextcloud: GIT Detected

Hello team, While i was testing nextcloud.com, I've detected GIT repository files. GIT repository files can disclose GIT repository usernames and file lists. While disclosures of this type do not provide direct attack vectors, they can be useful for an attacker when combined with other...

Nextcloud: CSRF token validation is missing

Greetings, Hello Security Team, Summary I know this is a medium risk issue but i want you guys to be aware of it that the CSRF token validation is missing at the time of login on https://portal.nextcloud.com/login.php login page. PoC Code: Email Password Login Now Forgot Password? var tabs = '';...

Nextcloud: https://portal.nextcloud.com/.htaccess file is readable

@mksahilisr reported a disclosure of the .htaccess file on https://portal.nextcloud.com. This has been resolved by adding the following to the Apache server configuration: order allow,deny deny from all Since the .htaccess file contained some potential sensitive data this report has only been...

Nextcloud: Delete All Data of Any User

If you are user have permission manage useradmin group, you can delete all data off website. step: 1. Create new user with username is '.'. 2. Delete user, who just have been created. Cause: when you create new use, nextcloud app will make a new folder same name with username, which have been...

Nextcloud Unauthorized Folder Creation Vulnerability

Nextcloud is an open source self-hosted file synchronization and sharing communication application platform from Nextcloud Germany.Nextcloud Server is one of the server version. An out-of-authority folder creation vulnerability exists in Nextcloud Server versions prior to 9.0.55 and prior to...

Nextcloud Information Disclosure Vulnerability

Nextcloud is an open source self-hosted file synchronization and sharing communication application platform from Nextcloud Germany.Nextcloud Server is one of the server version. An information disclosure vulnerability exists in Nextcloud Server versions prior to 9.0.55 and 10.0.2. The vulnerabili...

Nextcloud Quota Limit Bypass Vulnerability

Nextcloud is an open source self-hosted file synchronization and sharing communication application platform from Nextcloud Germany.Nextcloud Server is one of the server version. A security vulnerability exists in Nextcloud Server versions prior to 9.0.55 and prior to 10.0.2, which stems from the...

Nextcloud OCS API Elevation of Privilege Vulnerability

Nextcloud is an open source self-hosted file synchronization and sharing communication application platform from Nextcloud Germany.Nextcloud Server is one of the server version. An elevation of privilege vulnerability exists in Nextcloud Server versions prior to 9.0.55 and prior to 10.0.2. An...

Nextcloud Denial of Service Vulnerability

Nextcloud is an open source self-hosted file synchronization and sharing communication application platform from Nextcloud Germany.Nextcloud Server is one of the server version. A denial of service vulnerability exists in Nextcloud Server versions prior to 9.0.55 and prior to 10.0.2. An attacker...

Nextcloud Server Content Spoofing Vulnerability (CNVD-2017-05596)

Nextcloud is a suite of open source self-hosted file synchronization and sharing communication application platform. A content spoofing vulnerability exists in Nextcloud Server. An attacker could exploit this issue to manipulate and spoof content, which could facilitate further attacks...

Nextcloud Server Multiple Vulnerabilities - Windows

Nextcloud Server is prone to multiple vulnerabilities. SPDX-FileCopyrightText: 2017 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only CPE = "cpe:/a:nextcloud:nextcloudserver"...

Nextcloud Server Multiple Vulnerabilities - Linux

Nextcloud Server is prone to multiple vulnerabilities. SPDX-FileCopyrightText: 2017 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only CPE = "cpe:/a:nextcloud:nextcloudserver"...

Denial of service

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a Denial of Service attack. Due to an error in the application logic an authenticated adversary may trigger an endless recursion in the application leading to a potential Denial of Service...

Spoofing

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a Content-Spoofing vulnerability in the "files" app. The top navigation bar displayed in the files list contained partially user-controllable input leading to a potential misrepresentation of information...

Design/Logic Flaw

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a bypass in the quota limitation. Due to not properly sanitizing values provided by the OC-Total-Length HTTP header an authenticated adversary may be able to exceed their configured user quota. Thus using more space than allowed by the...

CVE-2017-0885

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a error message disclosing existence of file in write-only share. Due to an error in the application logic an adversary with access to a write-only share may enumerate the names of existing files and subfolders by comparing the exception...

CVE-2017-0886

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a Denial of Service attack. Due to an error in the application logic an authenticated adversary may trigger an endless recursion in the application leading to a potential Denial of Service...