Nextcloud: Group admin can remove user from all his groups via API

Steps 1. As admin make user1 group admin for group1 and group2 2. As user1 create a new user user2 3. As user1 try to remove the user from both groups via the UI 4. Take the first togglegroup.php request and replay it with group2 on curl Expected Should not work Actual The group-admin can escape...

Nextcloud: Drone Nextcloud

Greetings, On drone : https://drone.nextcloud.com We observe this : ---- F152818 I noticed that it's possible to alter the url to write what you want : ---- https://drone.nextcloud.com/rbcafe/settings/settings/badges F152817 In fact it could be anything : ----...

Nextcloud: HTTP-Basic Authentication on logs.nextcloud.com

Greetings, While visiting https://logs.nextcloud.com/ , I noticed that this server use HTTP-Basic Authentication. F152730 POC : ------ GET https://logs.nextcloud.com/ HTTP/1.1 User-Agent: Mozilla/5.0 Macintosh; Intel Mac OS X 10.11; rv:50.0 Gecko/20100101 Firefox/50.0 Accept:...

Nextcloud: Disclosure of administrators via JSON on nextcloud.com Wordpress

@rbcafe reported the following issue, since it contains references to internal data we've decided to disclose this issue only limitedly. ------- Greetings, Description : ---------------- Since the update of the website to wordpress 4.7 the JSON discloses administrators : POC : ----------------...

Nextcloud: WordPress <= 4.6.1 Stored XSS Via Theme File

Hello Team, Description:- Vulnerable code is located at /wp-admin/includes/class-theme-installer-skin.php POC:- https://nextcloud.com/readme.html F151887 FIX:- Upgrade wordpress to latest Refer:- https://wpvulndb.com/vulnerabilities/8718 https://www.mehmetince.net/low-severity-wordpress/ Attack...

Nextcloud: User Information Disclosure via REST API

Hello, I found out that you are using WP 4.6.2 on your domain which is outdated. https://nextcloud.com/readme.html Description:- WordPress versions 4.7 and earlier are affected by multiple security issues. Kindly check https://wpvulndb.com/wordpresses/462 for the vulnerabilities and in detailed...

ownCloud: bug reporting template encourages users to paste config file with passwords

The dangerous bug reporting template ============================= The github bug reporting template for owncloud's server and some apps contains this: The content of config/config.php: If you have access to your command line run e.g.: sudo -u www-data php occ config:list system from within your...

Nextcloud: bug reporting template encourages users to paste config file with passwords

The dangerous bug reporting template ============================= The github bug reporting template for nextcloud's server and some apps contains this: The content of config/config.php: If you have access to your command line run e.g.: sudo -u www-data php occ config:list system from within your...

Nextcloud: Review remote code execution in SwiftMailer

See https://github.com/swiftmailer/swiftmailer/issues/844 for details, research is on-going and this issue will be added more details later...

Nextcloud: No session logout after changing password & alsoandroid sessions not shown in sessions list so they can be deleted

There is no session logout after changing password and also if admin needs to disconnect some session of android no android sessions are shown in list If attacker has password and logins somehow using android app he may not be logged out as there are no session logout after changing password and...

Nextcloud: Reflected XSS in U2F plugin by shipping the example endpoints

While running a RIPS scan against our instrumentalized source code it noticed that the file /apps/twofactoru2f/vendor/yubico/u2flib-server/examples/localstorage/index.php echoes on user input: F145451 I was first a tad confused because the examples have been removed from our Git repository, but t...

Nextcloud: Limitation of app specific password scope can be bypassed (NC-SA-2017-009)

Limitation of app specific password scope can be bypassed NC-SA-2017-009 Risk level: Low CVSS v3 Base Score: 3 AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N CWE: Improper Authorization CWE-285 Description Improper session handling allowed an application specific password without permission to the files...

Nextcloud: Stored XSS on new Calling plugin (spreed)

There's a stored xss vulnerability .... Proof Of Concept : =============== 1. Set name as an xss payload like "x. F143238 2. Invite people to single call room. 3. Xss will execute in IE. It doesn't support CSP F143237 Impact : ======== Admin user can be xssed via this method if admin uses browser...

Nextcloud: BruteForce in to Admin Account

Hello, My self Abdulwahab, I want to Alert You that Your website is Facing a serious Problem Called : Username Enumeration This Problem is on nextcloud.com/wp-admin We Use wpscan to get username and the username is "frank" After getting username a user can Bruteforce it Using Wpscan and get acces...

Nextcloud: Login Hints on Admin Panel

Hi, Hope you are doing fine. I wanted to inform you regarding the enabling of the login hints on your wp-admin panelhttps://nextcloud.com/wp-login.php. Vulnerability: The admin panel shows very "specific" hint information if a hacker tries for a bruteforcing attack. Steps to reproduce: 1. Navigat...

Nextcloud: Wordpress Version Disclosure Bug On Nextcloud

Hi @nextcloud , Description Wordpress version disclosure. Affected items https://nextcloud.com/readme.html https://nextcloud.com/wp-admin/install.php https://nextcloud.com/wp-login.php The impact of this vulnerability Possible Wordpress Version information disclosure.You are using wordpress 4.6.1...

Nextcloud: Files Drop: WebDAV endpoint is leaking existence of resources

The new WebDAV endpoint implementation in 11 is leaking too many informations if one executes a MKCOL or a PUT against an existing item. With Files Drop one should only be able to upload files but not leak any existence of items. Leaking existence using PUT When doing a PUT the expectation is to...

Content-Spoofing in "dav" app - ownCloud

The exception message displayed on the DAV endpoints contained partially user-controllable input leading to a potential misrepresentation of information. Affected Software ownCloud Server 9.1.2 CVE-2016-???? core/96b8afe48570bc70088ccd8f897e9d71997d336e ownCloud Server 9.0.6 CVE-2016-????...

Stored XSS in CardDAV image export - ownCloud

The CardDAV image export functionality as implemented in ownCloud allows the download of images stored within a vCard. Due to not performing any kind of verification on the image content this is prone to a stored Cross-Site Scripting attack. Note:ownCloud employs a very strict Content Security...

OwnCloud/NextCloud Cross-Site Scripting Vulnerability

OwnCloud is a free and open source personal cloud storage solution from OwnCloud Germany.Nextcloud is an open source self-hosted file synchronization and sharing communication application platform.OwnCloud Server and Nextcloud Server are both a server version of one of them. A cross-site scriptin...