CVE-2023-2783

App Framework does not checks for the secret provided in the incoming webhook request

Mattermost Apps Framework fails to verify that a secret provided in the incoming webhook request allowing an attacker to modify the contents of the post sent by the Apps.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost

CVE-2023-2784

Apps Framework allows install requests from regular members via an internal path

Mattermost fails to verify if the requestor is a sysadmin or not, before allowing `install` requests to the Apps allowing a regular user send install requests to the Apps.

CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost

CVE-2023-2786

Channel commands execution doesn't properly verify permissions

Mattermost fails to properly check the permissions when executing commands allowing a member with no permissions to post a message in a channel to actually post it by executing channel commands.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

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Mattermost

Products

Mattermost

CVE-2023-2787

Collapsed Reply Threads APIs leak message contents from private channels

Mattermost fails to check channel membership when accessing message threads, allowing an attacker to access arbitrary posts by using the message threads API.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost

CVE-2023-2788

Deactivated user can retain access using oauth2 api

Mattermost fails to check if an admin user account active after an oauth2 flow is started, allowing an attacker with admin privileges to retain persistent access to Mattermost by obtaining an oauth2 access token while the attacker's account is deactivated.

CVSS 3.1 · 6.2 Medium EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost

CVE-2023-2791

Playbooks lets you edit arbitrary posts

When creating a playbook run via the /dialog API, Mattermost fails to validate all parameters, allowing an authenticated attacker to edit an arbitrary channel post.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

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Mattermost

Products

Mattermost

CVE-2023-2792

Ephemeral messages return private channel contents in permalink previews

Mattermost fails to sanitize ephemeral error messages, allowing an attacker to obtain arbitrary message contents by a specially crafted /groupmsg command.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

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Mattermost

Products

Mattermost

CVE-2023-2793

Stack exhaustion in PreparePostForClientWithEmbedsAndImages

Mattermost fails to validate links on external websites when constructing a preview for a linked website, allowing an attacker to cause a denial-of-service by a linking to a specially crafted webpage in a message.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost

CVE-2023-2797

Path traversal in GitHub plugin's code preview feature

Mattermost fails to sanitize code permalinks, allowing an attacker to preview code from private repositories by posting a specially crafted permalink on a channel.

CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost

CVE-2023-2831

Denial of Service while unescaping a Markdown string

Mattermost fails to unescape Markdown strings in a memory-efficient way, allowing an attacker to cause a Denial of Service by sending a message containing a large number of escaped characters.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost

CVE-2023-2785

Specially crafted search query can cause large log entries in postgres

Mattermost fails to properly truncate the postgres error log message of a search query failure allowing an attacker to cause the creation of large log files which can result in Denial of Service

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

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Mattermost

Products

Mattermost

CVE-2023-48268

Denial of Service via Board Import Zip Bomb

Mattermost fails to limit the amount of data extracted from compressed archives during board import in Mattermost Boards allowing an attacker to consume excessive resources, possibly leading to Denial of Service, by importing a board using a specially crafted zip (zip bomb).

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost

CVE-2023-47168

Open redirect in /oauth/<service>/mobile_login?redirect_to=

Mattermost fails to properly check a redirect URL parameter allowing for an open redirect was possible when the user clicked "Back to Mattermost" after providing a invalid custom url scheme in /oauth/{service}/mobile_login?redirect_to=

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

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Mattermost

Products

Mattermost

CVE-2023-45847

Playbook Plugin Crash via Run Checklist

Mattermost fails to to check the length when setting the title in a run checklist in Playbooks, allowing an attacker to send a specially crafted request and crash the Playbooks plugin

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost Server

CVE-2024-6428

Limited DoS due to permitting creating users with user-defined IDs

Mattermost versions 9.8.0, 9.7.x <= 9.7.4, 9.6.x <= 9.6.2, 9.5.x <= 9.5.5 fail to prevent specifying a RemoteId when creating a new user which allows an attacker to specify both a remoteId and the user ID, resulting in creating a user with a user-defined user ID. This can cause some broken functionality in User Management such administrative actions against the user not working.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost

CVE-2024-39830

Timing attack during remote cluster token comparison when shared channels are enabled

Mattermost versions 9.8.x <= 9.8.0, 9.7.x <= 9.7.4, 9.6.x <= 9.6.2 and 9.5.x <= 9.5.5, when shared channels are enabled, fail to use constant time comparison for remote cluster tokens which allows an attacker to retrieve the remote cluster token via a timing attack during remote cluster token comparison.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost

CVE-2024-39807

Channel IDs of archived/restored channels leaked via webhook events

Mattermost versions 9.5.x <= 9.5.5 and 9.8.0 fail to properly sanitize the recipients of a webhook event which allows an attacker monitoring webhook events to retrieve the channel IDs of archived or restored channels.

CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost

CVE-2024-39767

Spoofed push notifications from malicious server

Mattermost Mobile Apps versions <=2.16.0 fail to validate that the push notifications received for a server actually came from this serve that which allows a malicious server to send push notifications with another server’s diagnostic ID or server URL and have them show up in mobile apps as that server’s push notifications.

CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed

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Mattermost

Products

Mattermost Mobile

CVE-2024-39361

Creating posts with user-defined IDs permitted in CreatePost API

Mattermost versions 9.8.0, 9.7.x <= 9.7.4, 9.6.x <= 9.6.2 and 9.5.x <= 9.5.5 fail to prevent users from specifying a RemoteId for their posts which allows an attacker to specify both a remoteId and the post ID, resulting in creating a post with a user-defined post ID. This can cause some broken functionality in the channel or thread with user-defined posts

CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost

CVE-2024-39353

RemoteClusterFrame payloads are audit logged in full

Mattermost versions 9.5.x <= 9.5.5 and 9.8.0 fail to sanitize the RemoteClusterFrame payloads before audit logging them which allows a high privileged attacker with access to the audit logs to read message contents.

CVSS 3.1 · 2.7 Low EPSS < 1% KEV · Not listed

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Mattermost

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Mattermost