Nextcloud: Nextcloud Desktop Client RCE via malicious URI schemes

Nextcloud Desktop utilizes QT's QDesktopServices::openUrl to open URLs. This function invokes the OS'/Desktop environment's default application to handling the URI scheme and file extension. During the Nextcloud Add Account flow, the server's login website is opened within a native window/WebView...

Nextcloud Contacts Cross-Site Scripting Vulnerability (CNVD-2021-03031)

Nextcloud Contacts is the user interface for Nextcloud's CardDAV server. A cross-site scripting vulnerability exists in Nextcloud Contacts 3.4.0. The vulnerability stems from a missing file type check. The vulnerability can be exploited to conduct cross-site scripting attacks by uploading SVG fil...

Nextcloud Contacts Cross-Site Scripting Vulnerability (CNVD-2021-03032)

Nextcloud Contacts is the user interface for Nextcloud's CardDAV server. A cross-site scripting vulnerability exists in Nextcloud Contacts 3.3.0. The vulnerability stems from a missing file type check. An attacker can exploit this vulnerability by uploading a malicious SVG file to conduct a...

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-2020-8280

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-2020-8281

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-2020-8281

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...

Cross site scripting

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...

Cross site scripting

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-2020-8280

CVE-2020-8280 — Nextcloud Contacts 3.4.0 suffers from a missing file type check that lets an attacker upload SVG files with a PNG extension to trigger cross-site scripting (XSS) when viewing a contact image. The issue is documented across multiple feeds (NVD/NSS, CNVD, Red Hat, OSV, CNVD) and is ...

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-2020-8281

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-2020-8281

Nextcloud Contacts 3.3.0 is affected by a missing file type check that allows uploading SVG files, enabling cross-site scripting (XSS). The issue is documented in the Nextcloud advisory NC-SA-2020-045 and corroborated by CNVD/NVD entries and a related HackerOne report, indicating practical XSS vi...

Nextcloud 跨站脚本漏洞

Nextcloud Contacts is the user interface for Nextcloud's CardDAV server. A cross-site scripting vulnerability exists in Nextcloud Contacts 3.3.0. The vulnerability stems from a missing file type check. An attacker can exploit this vulnerability by uploading a malicious SVG file to conduct a...

Nextcloud 跨站脚本漏洞

Nextcloud Contacts is the user interface for Nextcloud's CardDAV server. A cross-site scripting vulnerability exists in Nextcloud Contacts 3.4.0. The vulnerability stems from a missing file type check. The vulnerability can be exploited to conduct cross-site scripting attacks by uploading SVG fil...

Nextcloud: Database error shown to the user when using a long guest name in richdocuments

When sharing a file to a guest and the file is allow for editing, the user is asked to enter a guestname if you enter a really long value for that name you get a database error that displays sensitive information: An exception occurred while executing 'INSERT INTO...

Nextcloud: Acting under any different user via DB-stored credentials

The issue is related to all Nextcloud versions. It is not patched yet. All versions 18-20 seems to be vulnerable. The issue came up in the following environment: - nextcloud docker image 20.0.2 and 20.0.3 - LDAP authentication - external SMB shares via DB stored credentials The problem came up...

Nextcloud: Two-factor authentication enforcement bypass

the attacker could bypass the two-factor authentication enforcement Steps to reproduce 1. Login with an Administrator account. 2. Click on your administrator profile icon. 3. Users - Add group - group name: Enforcement. 4. New User - Username: Bypass - Password: NextCloudEnforcement - Add User in...