65 matches found
CVE-2026-18799
Mattermost versions 11.10.x = 11.10.0, 11.7.x = 11.7.9, 11.9.x = 11.9.1, 11.8.x = 11.8.5 fail to restrict Slack import account binding to system administrator-initiated imports which allows an authenticated attacker with team admin privileges to force-add existing Mattermost users to their team a...
CVE-2026-18799
Mattermost Server versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, and 11.8.x
CVE-2026-18799
Mattermost versions 11.10.x = 11.10.0, 11.7.x = 11.7.9, 11.9.x = 11.9.1, 11.8.x = 11.8.5 fail to restrict Slack import account binding to system administrator-initiated imports which allows an authenticated attacker with team admin privileges to force-add existing Mattermost users to their team a...
CVE-2026-18799 Mattermost Server fails to restrict Slack import account binding, allowing team admins to forge posts as existing users
Mattermost versions 11.10.x = 11.10.0, 11.7.x = 11.7.9, 11.9.x = 11.9.1, 11.8.x = 11.8.5 fail to restrict Slack import account binding to system administrator-initiated imports which allows an authenticated attacker with team admin privileges to force-add existing Mattermost users to their team a...
EUVD-2026-102751
Mattermost versions 11.10.x = 11.10.0, 11.7.x = 11.7.9, 11.9.x = 11.9.1, 11.8.x = 11.8.5 fail to restrict Slack import account binding to system administrator-initiated imports which allows an authenticated attacker with team admin privileges to force-add existing Mattermost users to their team a...
CVE-2026-18799 Mattermost Server fails to restrict Slack import account binding, allowing team admins to forge posts as existing users
Mattermost versions 11.10.x = 11.10.0, 11.7.x = 11.7.9, 11.9.x = 11.9.1, 11.8.x = 11.8.5 fail to restrict Slack import account binding to system administrator-initiated imports which allows an authenticated attacker with team admin privileges to force-add existing Mattermost users to their team a...
CVE-2026-18799: Missing Authorization
Mattermost versions 11.10.x = 11.10.0, 11.7.x = 11.7.9, 11.9.x = 11.9.1, 11.8.x = 11.8.5 fail to restrict Slack import account binding to system administrator-initiated imports which allows an authenticated attacker with team admin privileges to force-add existing Mattermost users to their team a...
PT-2026-115512
Mattermost versions 11.10.x = 11.10.0, 11.7.x = 11.7.9, 11.9.x = 11.9.1, 11.8.x = 11.8.5 fail to restrict Slack import account binding to system administrator-initiated imports which allows an authenticated attacker with team admin privileges to force-add existing Mattermost users to their team a...
Mattermost authorization issue vulnerabilities
Mattermost versions 11.10.0 and earlier of 11.10.x series, 11.7.9 and earlier of 11.7.x series, 11.9.1 and earlier of 11.9.x series, and 11.8.5 and earlier of 11.8.x series have an authorization issue vulnerability. This vulnerability stems from the fact that Slack import account binding is not...
Insufficiently Protected Credentials
Overview Affected versions of this package are vulnerable to Insufficiently Protected Credentials via the Slack import process. An attacker can gain unauthorized access to user accounts by obtaining disclosed passwords and impersonating users. Remediation Upgrade...
Insufficiently Protected Credentials
Overview Affected versions of this package are vulnerable to Insufficiently Protected Credentials via the Slack import process. An attacker can gain unauthorized access to user accounts by obtaining disclosed passwords and impersonating users. Remediation Upgrade...
CVE-2026-6345 Prevent password disclosure and force reset during Slack import
Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 fail prevent disclosure of created user password which allows a malicious attacker to impersonate a user via the use of some of those passwords.. Mattermost Advisory ID: MMSA-2026-00614...
CVE-2026-6345 Prevent password disclosure and force reset during Slack import
Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 fail prevent disclosure of created user password which allows a malicious attacker to impersonate a user via the use of some of those passwords.. Mattermost Advisory ID: MMSA-2026-00614...
CVE-2026-6345 Prevent password disclosure and force reset during Slack import
Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 fail prevent disclosure of created user password which allows a malicious attacker to impersonate a user via the use of some of those passwords.. Mattermost Advisory ID: MMSA-2026-00614...
CVE-2026-6345
Mattermost advisory CVE-2026-6345 affects Mattermost versions 11.4.x ≤ 11.4.3, 11.5.x ≤ 11.5.1 and 10.11.x ≤ 10.11.13. The issue is described as failing to prevent disclosure of created user passwords during the Slack import process, which could allow a malicious actor to impersonate a user using...
Improper Authentication
github.com/mattermost/mattermost-server is vulnerable to improper authentication. The vulnerability is due to failure to validate email ownership during the Slack import process, which allows an attacker to create verified user accounts with arbitrary email domains and bypass email-based team...
SUSE CVE-2025-41410
Mattermost versions 10.10.x = 10.10.2, 10.5.x = 10.5.10, 10.11.x = 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictio...
Mattermost Server 10.5.x < 10.5.11 / 10.10.x < 10.10.3 / 10.11.x 10.11.3 / 10.12.0 Missing Authorization (MMSA-2025-00525)
The version of Mattermost Server installed on the remote host is affected by a vulnerability as referenced in the MMSA-2025-00525 advisory. - Mattermost versions 10.10.x = 10.10.2, 10.5.x = 10.5.10, 10.11.x = 10.11.2 fail to validate email ownership during Slack import process which allows...
CVE-2025-41410
Mattermost versions 10.10.x = 10.10.2, 10.5.x = 10.5.10, 10.11.x = 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictio...