Nextcloud Contacts Data Compromise

The vulnerability of the Nextcloud Contacts application, a cloud-based software for creating and using Nextcloud data storage, is related to the lack of protective measures for the website structure. Exploiting this vulnerability could allow an attacker to compromise the confidentiality and...

ROS-20260129-73-0050

Vulnerability in nextcloud-app-contacts related to failure to take measures to protect web page structure. Exploitation of the vulnerability could allow an attacker acting remotely to execute arbitrary code...

CVE-2025-66554

Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were correctly blocked ...

CVE-2025-66554

Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were correctly blocked ...

CVE-2025-66554 Nextcloud Contacts vulnerable to Stored XSS in contacts app via organisation and title field

Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were correctly blocked ...

CVE-2025-66554 Nextcloud Contacts vulnerable to Stored XSS in contacts app via organisation and title field

Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were correctly blocked ...

CVE-2025-66554

CVE-2025-66554 affects the Nextcloud Contacts app. Multiple sources (NVD, Red Hat, CIRCL, OSV, CVE list, GHSA advisory, and more) describe a Stored XSS vulnerability in which a malicious user could modify the organisation and title fields to load additional CSS files. The issue existed in affecte...

PT-2025-54979

Уязвимость приложения Nextcloud Contacts облачного программного обеспечения для создания и использования хранилища данных Nextcloud связана с непринятием мер по защите структуры веб-страницы. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, оказать воздействие на...

EUVD-2020-29149

Malware in sbrugna...

EUVD-2020-29062

Malware in sbrugna...

EUVD-2020-29148

Malware in sbrugna...

EUVD-2021-25594

Malware in sbrugna...

EUVD-2018-15570

Malware in sbrugna...

CVE-2021-39221

Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Contacts application prior to version 4.0.3 was vulnerable to a stored Cross-Site Scripting XSS vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file in a new tab. Due t...

CVE-2020-8281

A missing file type check in Nextcloud Contacts 3.3.0 allows a malicious user to upload malicious SVG files to perform cross-site scripting XSS attacks...

CVE-2020-8280

A missing file type check in Nextcloud Contacts 3.4.0 allows a malicious user to upload SVG files as PNG files to perform cross-site scripting XSS attacks...

CVE-2020-8181

A missing file type check in Nextcloud Contacts 3.2.0 allowed a malicious user to upload any file as avatars...

CVE-2023-33182 Nextcloud Contacts photos only sanitized if mime type is all lower case

Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. The unsanitized SVG is converted to a JavaScript blob in memory data that the Avatar can't render. Due to this constellation the missing sanitization does not seem to be exploitable. It i...

NextCloud Contacts security vulnerability

Nextcloud is a suite of open source, self-hosted file synchronization and sharing communication application platform from Nextcloud, Germany. A security vulnerability exists in Nextcloud Contacts 5.0.3 and earlier or 4.2.4 and earlier. No information about this vulnerability is available at this...

PT-2023-24199 · Nextcloud · Nextcloud Contacts

Name of the Vulnerable Software and Affected Versions: Nextcloud Contacts app versions prior to 4.2.4 Nextcloud Contacts app versions prior to 5.0.3 Description: The issue concerns the handling of unsanitized SVG files in the Contacts app for Nextcloud. These files are converted into JavaScript...