Security Vulnerabilities
Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21, 11.8.x <= 11.8.3 fails to reconcile SchemeAdmin flags with a user's current role which allows a user demoted to System Guest to retain Board Admin privileges and perform admin-only operations via the Boards REST API or UI.. Mattermost Advisory ID: MMSA-2026-00691
CVSS Score
6.3
EPSS Score
0.002
Published
2026-08-17
Mattermost versions 11.7.x <= 11.7.6, 11.8.x <= 11.8.3 The access control policy unassign endpoint fails to re-validate that each target channel still belongs to the requesting admin's team, which allows an authenticated team administrator to remove ABAC (attribute-based access control) policy assignments from channels outside their team via the policy unassign API after a channel has been moved to another team.. Mattermost Advisory ID: MMSA-2026-00718
CVSS Score
4.2
EPSS Score
0.001
Published
2026-08-17
Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to prevent guest users from receiving Board Admin privileges during board archive import which allows a board member to escalate a guest user to Board Admin via importing a crafted .boardarchive file. Mattermost Advisory ID: MMSA-2026-00672
CVSS Score
5.4
EPSS Score
0.002
Published
2026-08-17
Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 Mattermost failed to restrict OAuth deauthorization and personal access token management endpoints to direct user sessions, which allowed an OAuth app with a delegated user token to revoke the user's authorizations or tokens for other integrations via account-management endpoints.. Mattermost Advisory ID: MMSA-2026-00704
CVSS Score
4.3
EPSS Score
0.002
Published
2026-08-17
Dell ObjectScale, versions prior to 4.3.0.1, contain(s) an Uncontrolled Search Path Element vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Elevation of privileges.
CVSS Score
7.3
EPSS Score
0.001
Published
2026-08-17
Dell ObjectScale, versions prior to 4.3.0.1, contain(s) an Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Command execution.
CVSS Score
7.3
EPSS Score
0.005
Published
2026-08-17
Dell ObjectScale, versions prior to 4.3.0.1, contain(s) an Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Elevation of privileges.
CVSS Score
7.8
EPSS Score
0.004
Published
2026-08-17
Dell ObjectScale, versions prior to 4.3.0.1, contain(s) a Path Traversal vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Information tampering.
CVSS Score
7.1
EPSS Score
0.001
Published
2026-08-17
Dell ObjectScale, versions prior to 4.3.0.1, contain(s) an Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Elevation of privileges.
CVSS Score
7.8
EPSS Score
0.004
Published
2026-08-17
Dell ObjectScale, versions prior to 4.3.0.1, contain(s) an Insertion of Sensitive Information into Log File vulnerability in the svc_tools. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Information disclosure.
CVSS Score
5.5
EPSS Score
0.001
Published
2026-08-17