CVE-2023-5331

File Information Leak via IDOR in file_id in Draft Posts

Mattermost fails to properly check the creator of an attached file when adding the file to a draft post, potentially exposing unauthorized file information.

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

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-5330

Denial of Service via Opengraph Data Cache

Mattermost fails to enforce a limit for the size of the cache entry for OpenGraph data allowing an attacker to send a specially crafted request to the /api/v4/opengraph filling the cache and turning the server unavailable.

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

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-5196

DoS via Channel Notification Properties

Mattermost fails to enforce character limits in all possible notification props allowing an attacker to send a really long value for a notification_prop resulting in the server consuming an abnormal quantity of computing resources and possibly becoming temporarily unavailable for its users.

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

Vendors

Mattermost

Products

Mattermost

CVE-2023-5195

A team member can soft delete other teams that they are not part of

Mattermost fails to properly validate the permissions when soft deleting a team allowing a team member to soft delete other teams that they are not part of

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

Vendors

Mattermost

Products

Mattermost

CVE-2023-5194

A system/user manager can demote / deactivate another manager

Mattermost fails to properly validate permissions when demoting and deactivating a user allowing for a system/user manager to demote / deactivate another manager

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

Vendors

Mattermost

Products

Mattermost

CVE-2023-5193

System Role with manage posts permission can read posts of Direct Messages

Mattermost fails to properly check permissions when retrieving a post allowing for a System Role with the permission to manage channels to read the posts of a DM conversation.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2023-5160

Full name disclosure via team top membership with Show Full Name option disabled

Mattermost fails to check the Show Full Name option at the /api/v4/teams/TEAM_ID/top/team_members endpoint allowing a member to get the full name of another user even if the Show Full Name option was disabled

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

Vendors

Mattermost

Products

Mattermost

CVE-2023-5159

A User Manager role with user edit permissions could manage/update bots

Mattermost fails to properly verify the permissions when managing/updating a bot allowing a User Manager role with user edit permissions to manage/update bots.

CVSS 3.1 · 3.8 Low EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2023-4478

Parameter tampering in the registration resulting in blocked accounts to be created

Mattermost fails to restrict which parameters' values it takes from the request during signup allowing an attacker to register users as inactive, thus blocking them from later accessing Mattermost without the system admin activating their accounts.

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

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-4108

Audit logging fails to sanitize post metadata

Mattermost fails to sanitize post metadata during audit logging resulting in permalinks contents being logged

CVSS 3.1 · 4.5 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2023-4107

Incorrect authorization allows a user manager to update a system admin

Mattermost fails to properly validate the requesting user permissions when updating a system admin, allowing a user manager to update a system admin's details such as email, first name and last name.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2023-4106

A guest user can perform various actions on public playbooks

Mattermost fails to check if the requesting user is a guest before performing different actions to public playbooks, resulting a guest being able to view, join, edit, export and archive public playbooks.

CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2023-4105

Attachment of deleted message in a thread remains accessible and downloadable

Mattermost fails to delete the attachments when deleting a message in a thread allowing a simple user to still be able to access and download the attachment of a deleted message

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

Vendors

Mattermost

Products

Mattermost

CVE-2023-49874

IDOR when updating the tasks of a private playbook run

Mattermost fails to check whether a user is a guest when updating the tasks of a private playbook run allowing a guest to update the tasks of a private playbook run if they know the run ID.

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

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-49809

Todo plugin gets crashed and disabled by member

Mattermost fails to handle a null request body in the /add endpoint, allowing a simple member to send a request with null request body to that endpoint and make it crash. After a few repetitions, the plugin is disabled. 

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

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-49607

Playbook plugin crash via missing interface type assertion

Mattermost fails to validate the type of the "reminder" body request parameter allowing an attacker to crash the Playbook Plugin when updating the status dialog.

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

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-48369

Log Flooding due to specially crafted requests in different endpoints

Mattermost fails to limit the log size of server logs allowing an attacker sending specially crafted requests to different endpoints to potentially overflow the log.

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

Vendors

Mattermost

Products

Mattermost

CVE-2023-47865

Username and Icon override can be used by members when Hardened Mode is enabled

Mattermost fails to check if hardened mode is enabled when overriding the username and/or the icon when posting a post. If settings allowed integrations to override the username and profile picture when posting, a member could also override the username and icon when making a post even if the Hardened Mode setting was enabled

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

Vendors

Mattermost

Products

Mattermost

CVE-2023-46701

Inaccessible Post Information Leak via Run Timeline IDOR

Mattermost fails to perform authorization checks in the /plugins/playbooks/api/v0/runs/add-to-timeline-dialog endpoint of the Playbooks plugin allowing an attacker to get limited information about a post if they know the post ID

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

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-45223

Users full name disclosure through Mattermost Boards with Show Full Name Option disabled

Mattermost fails to properly validate the "Show Full Name" option in a few endpoints in Mattermost Boards, allowing a member to get the full name of another user even if the Show Full Name option was disabled. 

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

Vendors

Mattermost

Products

Mattermost