Authentication Bypass by Primary Weakness

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Authentication Bypass by Primary Weakness in the OAuth refresh token grant process. An attacker can maintain unauthorized access by using a valid...

Incorrect Authorization

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Incorrect Authorization via the membership sync process. An attacker can remove users from any channel, including private channels, by sending...

Authentication Bypass by Primary Weakness

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Authentication Bypass by Primary Weakness in the OAuth authorization code redemption process. An attacker can gain unauthorized access to resource...

Time-of-check Time-of-use (TOCTOU) Race Condition

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Time-of-check Time-of-use TOCTOU Race Condition in the authentication process. An attacker can gain unauthorized access to multiple authenticated...

Improper Handling of Highly Compressed Data (Data Amplification)

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data Data Amplification in the archive extraction process. An attacker can exhaust server memory by uploadi...

Incorrect Authorization

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Incorrect Authorization via the group retrieval endpoint. An attacker can enumerate user IDs outside their allowed visibility scope by sending...

Cross-site Request Forgery (CSRF)

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Cross-site Request Forgery CSRF via the UpdateAccessControlPolicyActiveStatus endpoint. An attacker can change the active status of access control...

Incorrect Authorization

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Incorrect Authorization via the search API endpoints. An attacker can gain unauthorized access to posts and files in channels by sending crafted...

Improper Validation of Specified Type of Input

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Improper Validation of Specified Type of Input due to improper validation of User-Agent header tokens. An attacker can trigger a panic in the...

Privilege Context Switching Error

Overview Affected versions of this package are vulnerable to Privilege Context Switching Error in the current user session. An attacker can remove comments created by other users by sending crafted requests with insufficient permission checks. Remediation Upgrade...

Incorrect Implementation of Authentication Algorithm

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm. An attacker can gain unauthorized access to another user's account by leveraging a specially...

Incorrect Implementation of Authentication Algorithm

Overview Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm. An attacker can gain unauthorized access to another user's account by leveraging a specially crafted email address when switching authentication methods and sending a request to the...

Use of Weak Hash

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Use of Weak Hash via the FNV-1 hashing process for cache key validation. An attacker can access unauthorized posts and manipulate link previews by...

Insufficiently Protected Credentials

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Insufficiently Protected Credentials via the invite mechanism for remote clusters. An attacker can send unauthorized synchronization payloads by...

Missing Authentication for Critical Function

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Missing Authentication for Critical Function in the deduplicateCreatePost method. An attacker can access posts in private channels without proper...

Incorrect Implementation of Authentication Algorithm

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm. due to the improper invalidation of personal access tokens. An attacker can maintain access...

Incorrect Implementation of Authentication Algorithm

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm. due to improper handling of OAuth credential cleanup. An attacker can maintain access and...

Overly Restrictive Account Lockout Mechanism

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Overly Restrictive Account Lockout Mechanism due to the failure in the lockout mechanism for LDAP users after multiple unsuccessful login attempts...

Incorrect Implementation of Authentication Algorithm

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm due to persisting authentication data in a cache when performing ConvertUserToBot. A user who...

Incorrect Authorization

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Incorrect Authorization in the SessionHasPermissionToChannel function, even when the "Allow users to view archived channels" System Console settin...