Nextcloud Desktop vulnerabilities

CVE-2021-22879 [HIGH] CWE-99 CVE-2021-22879: Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing valida Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

CVE-2024-46958 [CRITICAL] CVE-2024-46958: In Nextcloud Desktop Client 3.13.1 through 3.13.3 on Linux, synchronized files (between the server a In Nextcloud Desktop Client 3.13.1 through 3.13.3 on Linux, synchronized files (between the server and client) may become world writable or world readable. This is fixed in 3.13.4.

CVE-2020-8227 [MEDIUM] CWE-22 CVE-2020-8227: Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a mali Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.

CVE-2024-37885 [HIGH] CWE-94 CVE-2024-37885: The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer. A code injection in Nextcloud Desktop Client for macOS allowed to load arbitrary code when starting the client with DYLD_INSERT_LIBRARIES set in the enviroment. It is recommended that the Nextcloud Desktop client is upgraded to 3.12.0.

CVE-2023-22472 [HIGH] CWE-352 CVE-2023-22472: Deck is a kanban style organization tool aimed at personal planning and project organization for tea Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. It is possible to make a user send any POST request with an arbitrary body given they click on a malicious deep link on a Windows computer. (e.g. in an email, chat link, etc). There are currently no known workarounds. It is

CVE-2024-52510 [HIGH] CWE-295 CVE-2024-52510: The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer. The Desktop client did not stop with an error but allowed by-passing the signature validation, if a manipulated server sends an empty initial signature. It is recommended that the Nextcloud Desktop client is upgraded to 3.14.2 or later.

CVE-2020-8224 [HIGH] CWE-94 CVE-2020-8224: A code injection in Nextcloud Desktop Client 2.6.4 allowed to load arbitrary code when placing a mal A code injection in Nextcloud Desktop Client 2.6.4 allowed to load arbitrary code when placing a malicious OpenSSL config into a fixed directory.

CVE-2022-41882 [HIGH] CWE-94 CVE-2022-41882: The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with your computer. In version 3.6.0, if a user received a malicious file share and has it synced locally or the virtual filesystem enabled and clicked a nc://open/ link it will open the default editor for the file type of the shared file, which on Windows can also someti

CVE-2020-8225 [HIGH] CWE-312 CVE-2020-8225: A cleartext storage of sensitive information in Nextcloud Desktop Client 2.6.4 gave away information A cleartext storage of sensitive information in Nextcloud Desktop Client 2.6.4 gave away information about used proxies and their authentication credentials.

CVE-2021-32728 [MEDIUM] CWE-295 CVE-2021-32728: The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. C The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. Clients using the Nextcloud end-to-end encryption feature download the public and private key via an API endpoint. In versions prior to 3.3.0, the Nextcloud Desktop client fails to check if a private key belongs to previously downloaded public certific

CVE-2021-37617 [HIGH] CWE-426 CVE-2021-37617: The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. T The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. The Nextcloud Desktop Client invokes its uninstaller script when being installed to make sure there are no remnants of previous installations. In versions 3.0.3 through 3.2.4, the Client searches the `Uninstall.exe` file in a folder that can be written b

CVE-2023-28997 [MEDIUM] CWE-323 CVE-2023-28997: The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with ver The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.6.5, a malicious server administrator can recover and modify the contents of end-to-end encrypted files. Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are availabl

CVE-2023-29000 [MEDIUM] CWE-295 CVE-2023-29000: The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with ver The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.7.0, by trusting that the server will return a certificate that belongs to the keypair of the user, a malicious server could get the desktop client to encrypt files with a key known to the attacker. This issue is fixe

CVE-2023-28999 [MEDIUM] CWE-325 CVE-2023-28999: Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Ne Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app 3.13.0 until 3.25.0, and Nextcloud iOS app 3.0.5 until 4.8.0, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure and add new files.​ This is

CVE-2020-8140 [MEDIUM] CWE-94 CVE-2020-8140: A code injection in Nextcloud Desktop Client 2.6.2 for macOS allowed to load arbitrary code when sta A code injection in Nextcloud Desktop Client 2.6.2 for macOS allowed to load arbitrary code when starting the client with DYLD_INSERT_LIBRARIES set in the environment.

CVE-2023-28998 [MEDIUM] CWE-325 CVE-2023-28998: The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with ver The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.6.5, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure, and add new files.​ Users should upgrade the Nextcloud Desktop client

CVE-2025-47792 [MEDIUM] CWE-284 CVE-2025-47792: Nextcloud Desktop is the desktop sync client for Nextcloud. In versions of Nextcloud Desktop prior t Nextcloud Desktop is the desktop sync client for Nextcloud. In versions of Nextcloud Desktop prior to 3.15, 3rdparty applications already installed on a user machine can create link shares for almost all data via the socket API. These shares can then be easily sent off to an external service. Nextcloud Desktop fixes the issue in version 3.15. No kno

CVE-2022-39333 [MEDIUM] CWE-79 CVE-2022-39333: Nexcloud desktop is the Desktop sync client for Nextcloud. An attacker can inject arbitrary HyperTex Nexcloud desktop is the Desktop sync client for Nextcloud. An attacker can inject arbitrary HyperText Markup Language into the Desktop Client application. It is recommended that the Nextcloud Desktop client is upgraded to 3.6.1. There are no known workarounds for this issue.

CVE-2023-23942 [MEDIUM] CWE-79 CVE-2023-23942: The Nextcloud Desktop Client is a tool to synchronize files from a Nextcloud Server with your comput The Nextcloud Desktop Client is a tool to synchronize files from a Nextcloud Server with your computer. Versions prior to 3.6.3 are missing sanitisation on qml labels which are used for basic HTML elements such as `strong`, `em` and `head` lines in the UI of the desktop client. The lack of sanitisation may allow for javascript injection. It is recomm

CVE-2021-22895 [MEDIUM] CWE-295 CVE-2021-22895: Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack o Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack of SSL certificate verification when using the "Register with a Provider" flow.