Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization involving invite tokens. An attacker can manipulate channel memberships, including adding or removing users from private channels, by replaying intercepted tokens. Remediation Upgrade...

CVE-2025-13324 Lack of Invalidation of Legacy Remote Cluster Invite Tokens After Confirmation

Mattermost versions 10.11.x = 10.11.5, 11.0.x = 11.0.4, 10.12.x = 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy version 1 protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to...

CVE-2025-13324 Lack of Invalidation of Legacy Remote Cluster Invite Tokens After Confirmation

Mattermost versions 10.11.x = 10.11.5, 11.0.x = 11.0.4, 10.12.x = 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy version 1 protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to...

CVE-2025-13324

CVE-2025-13324 affects Mattermost server versions 10.11.x <= 10.11.5, 11.0.x <= 11.0.4, and 10.12.x

CVE-2025-13324 Lack of Invalidation of Legacy Remote Cluster Invite Tokens After Confirmation

Mattermost versions 10.11.x = 10.11.5, 11.0.x = 11.0.4, 10.12.x = 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy version 1 protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to...

Improper Authorization

github.com/mattermost/mattermost-server is vulnerable to Improper Authorization. The vulnerability is due to failure to verify whether a user has permission to join a Mattermost team when processing the original invite token, which allows an attacker to manipulate the RelayState parameter and joi...

SUSE CVE-2017-18902

An issue was discovered in Mattermost Server before 4.1.0, 4.0.4, and 3.10.3. It allows attackers to discover team invite IDs via team API endpoints...

PT-2025-51854

Mattermost versions 10.11.x = 10.11.5, 11.0.x = 11.0.4, 10.12.x = 10.12.2 fail to invalidate invite tokens after use which allows malicious actors who have intercepted invite tokens to manipulate channel memberships including adding or removing users from private channels via token replay attack...

SUSE CVE-2018-21258

An issue was discovered in Mattermost Server before 5.1. It allows attackers to cause a denial of service via the invitepeople slash command...

GO-2025-4185 Mattermost Server exposes team invite IDs through API endpoints in github.com/mattermost/mattermost-server

Mattermost Server exposes team invite IDs through API endpoints in github.com/mattermost/mattermost-server...

Improper Access Control

github.com/mattermost/mattermost-server is vulnerable to improper access control. The vulnerability is due to Mattermost failing to verify whether a user has permission to join a team when using the original invite token, which allows an attacker to manipulate the OAuth state and join any team on...

CVE-2025-58386

In Terminalfour 8 through 8.4.1.1, the userLevel parameter in the user management function is not subject to proper server-side authorization checks. A Power User can intercept and modify this parameter to assign the Administrator role to other existing lower-privileged accounts, or invite a new...

CVE-2025-66223 OpenObserve's Invite Token Lifecycle Misconfiguration

OpenObserve is a cloud-native observability platform. Prior to version 0.16.0, organization invitation tokens do not expire once issued, remain valid even after the invited user is removed from the organization, and allow multiple invitations to the same email with different roles where all issue...

CVE-2025-66223

OpenObserve (cloud-native observability platform) before v0.16.0 is affected by an access-control issue in the invitation token lifecycle. Tokens did not expire, remained valid after a user was removed, and allowed multiple invitations to the same email with different roles—resulting in a removed...

CVE-2025-66223 OpenObserve's Invite Token Lifecycle Misconfiguration

OpenObserve is a cloud-native observability platform. Prior to version 0.16.0, organization invitation tokens do not expire once issued, remain valid even after the invited user is removed from the organization, and allow multiple invitations to the same email with different roles where all issue...

CVE-2025-66223 OpenObserve's Invite Token Lifecycle Misconfiguration

OpenObserve is a cloud-native observability platform. Prior to version 0.16.0, organization invitation tokens do not expire once issued, remain valid even after the invited user is removed from the organization, and allow multiple invitations to the same email with different roles where all issue...

EUVD-2025-199752

Insecure Direct Object Reference IDOR in classroomio 0.1.13 allows unauthorized share and invite access to course settings...

Microsoft Teams Flaw in Guest Chat Exposes Users to Malware Attacks

New research from Ontinue exposes a major security flaw in Microsoft Teams B2B Guest Access. Learn how attackers bypass all Defender for Office 365 protections with a single invite...

CVE-2025-65672

Insecure Direct Object Reference IDOR in classroomio 0.1.13 allows unauthorized share and invite access to course settings...

CVE-2025-65672

CVE-2025-65672 concerns an insecure direct object reference (IDOR) in ClassroomIO 0.1.13, enabling unauthorized sharing and inviting access to course settings. Connected sources consistently describe the root cause as broken access control with IDOR, allowing a student‑level user to manipulate co...