143 matches found
EUVD-2026-22915
Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...
Mattermost has session spoofing due to lack of single-use consumption of guest magic link tokens enforcement
Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...
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...
GHSA-MH4X-RMRX-3HP4 Mattermost has session spoofing due to lack of single-use consumption of guest magic link tokens enforcement
Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...
CVE-2026-3590
Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...
CVE-2026-3590
Mattermost CVE-2026-3590 describes a race condition in the guest magic link authentication flow that fails to enforce atomic single-use for tokens. A valid magic link can be used to establish multiple independent authenticated sessions via concurrent requests on affected versions: Mattermost 10.1...
CVE-2026-3590
Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...
CVE-2026-3590 Race Condition in Guest Magic Link Authentication Allows Token Reuse
Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...
CVE-2026-3590 Race Condition in Guest Magic Link Authentication Allows Token Reuse
Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...
CVE-2026-3590 Race Condition in Guest Magic Link Authentication Allows Token Reuse
Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...
PT-2026-33054
Name of the Vulnerable Software and Affected Versions Mattermost versions 10.11.0 through 10.11.12 Mattermost version 11.5.0 Mattermost versions 11.4.0 through 11.4.2 Mattermost versions 11.3.0 through 11.3.2 Description Failure to enforce atomic single-use consumption of guest magic link tokens...
CVE-2026-3590: Time-of-check Time-of-use (TOCTOU) Race Condition
Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...
Mattermost 安全漏洞
Mattermost is an open-source collaboration platform developed by the American company Mattermost. Vulnerabilities exist in Mattermost versions 10.11.12 and earlier of the 10.11.x series, as well as versions 11.5.0 and earlier of the 11.5.x series, 11.4.2 and earlier of the 11.4.x series, and 11.3...
Exploit for CVE-2026-39912
CVE-2026-39912 - Xboard / V2Board Unauth Account Takeover M...
Open Redirect
Overview Affected versions of this package are vulnerable to Open Redirect through the redirecturi parameter in multiple endpoints ForgotPassword, MagicLinkLogin, Signup, InviteMembers, OAuthLoginHandler, VerifyEmailHandler which is not validated against AllowedOrigins. An attacker can obtain...
Authorizer: Password reset token theft and full auth token redirect via unvalidated redirect_uri
Hi, I found that 6 endpoints in Authorizer accept a user-controlled redirecturi and append sensitive tokens to it without validating the URL against AllowedOrigins. The OAuth /app handler validates redirecturi at httphandlers/app.go:46, but the GraphQL mutations and verifyemail handler skip...
GHSA-X3F4-V83F-7WP2 Authorizer: Password reset token theft and full auth token redirect via unvalidated redirect_uri
Hi, I found that 6 endpoints in Authorizer accept a user-controlled redirecturi and append sensitive tokens to it without validating the URL against AllowedOrigins. The OAuth /app handler validates redirecturi at httphandlers/app.go:46, but the GraphQL mutations and verifyemail handler skip...
Authorizer: CQL/N1QL Injection in Cassandra and Couchbase Backends via fmt.Sprintf String Interpolation
Vulnerability Details CWE: CWE-943 - Improper Neutralization of Special Elements in Data Query Logic All 66+ CQL queries in internal/storage/db/cassandradb/ use fmt.Sprintf to interpolate user-controlled values directly into CQL query strings without parameterization. Unauthenticated endpoints...
GHSA-R33W-FG8J-9C94 MagicLink: Insecure Deserialization of MagicLink Actions Leads to Remote Code Execution
Description MagicLink stores serialized action objects in the magiclinks.action database column and deserializes them without integrity validation or class allowlisting in src/MagicLink.php and src/Actions/ResponseAction.php. An attacker with the ability to manipulate database records e.g., via S...