CVE-2026-19603

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10, 11.10.x = 11.10.1 fail to sanitize the active channel field returned by the user status API endpoints, which allows an authenticated user to learn the channel ID of a private channel another user is actively viewing via the...

CVE-2026-19603

Mattermost versions 11.9.x <= 11.9.1 , 11.8.x <= 11.8.5 , 11.7.x <= 11.7.10 , and 11.10.x

CVE-2026-19603

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10, 11.10.x = 11.10.1 fail to sanitize the active channel field returned by the user status API endpoints, which allows an authenticated user to learn the channel ID of a private channel another user is actively viewing via the...

EUVD-2026-102742

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10, 11.10.x = 11.10.1 fail to sanitize the active channel field returned by the user status API endpoints, which allows an authenticated user to learn the channel ID of a private channel another user is actively viewing via the...

CVE-2026-19603: Insertion of Sensitive Information Into Sent Data

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10, 11.10.x = 11.10.1 fail to sanitize the active channel field returned by the user status API endpoints, which allows an authenticated user to learn the channel ID of a private channel another user is actively viewing via the...

PT-2026-115517

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10, 11.10.x = 11.10.1 fail to sanitize the active channel field returned by the user status API endpoints, which allows an authenticated user to learn the channel ID of a private channel another user is actively viewing via the...

Mattermost information leakage vulnerability

Mattermost versions 11.9.1 and earlier of 11.9.x series, 11.8.5 and earlier of 11.8.x series, 11.7.10 and earlier of 11.7.x series, and 11.10.1 and earlier of 11.10.x series have a vulnerability related to information leakage. This vulnerability arises from the fact that the activity channel fiel...

SUSE CVE-2021-41239

Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It...

PT-2022-37627

This update for nextcloud fixes the following issues: nextcloud was updated to 21.0.9: - CVE-2021-41239 CWE-200: user enumeration setting not obeyed in User Status API boo1196905 - CVE-2021-41241 CWE-863: groupfolders advanced permissions is not obeyed for subfolders boo1196908 - CVE-2021-41741...

CVE-2021-41239

Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It...

CVE-2021-41239

Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It...

Code injection

Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It...

CVE-2021-41239 User enumeration setting not respected in Nextcloud server

Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It...

CVE-2021-41239

CVE-2021-41239 affects Nextcloud Server. The issue arises when the User Status API does not respect the administrator’s user enumeration settings, allowing a user to enumerate other users on the instance even if listings are disabled. The vulnerability is described in multiple connected sources a...

CVE-2021-41239

Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It...

User enumeration setting not obeyed in User Status API

None...

CVE-2021-41239: Exposure of Sensitive Information to an Unauthorized Actor

Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It...

PT-2022-11377 · Nextcloud +1 · Nextcloud Server +1

Name of the Vulnerable Software and Affected Versions: Nextcloud Server versions prior to 20.0.14 Nextcloud Server versions prior to 21.0.6 Nextcloud Server versions prior to 22.2.1 Description: The Nextcloud server is a self-hosted system designed to provide cloud-style services. In affected...