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CVE-2024-42497

Insufficient permissions checks on teams

Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0, 9.8.x <= 9.8.2 fail to properly enforce permissions which allows a user with systems manager role with read-only access to teams to perform write operations on teams.

CVSS 3.1 · 6 Medium EPSS < 1% KEV · Not listed
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Mattermost Mattermost Server
CVE-2024-42406

Unauthorized access on archived channels

Mattermost versions 9.11.x <= 9.11.0, 9.10.x <= 9.10.1, 9.9.x <= 9.9.2 and 9.5.x <= 9.5.8 fail to properly authorize requests when viewing archived channels is disabled, which allows an attacker to retrieve post and file information about archived channels. Examples are flagged or unread posts as well as files.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
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CVE-2024-47145

Unauthorized access on archived channels via file links

Mattermost versions 9.5.x <= 9.5.8 fail to properly authorize access to archived channels when viewing archived channels is disabled, which allows an attacker to view posts and files of archived channels via file links.

CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
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CVE-2024-47003

DoS via non-string message using permalink embed

Mattermost versions 9.11.x <= 9.11.0 and 9.5.x <= 9.5.8 fail to validate that the message of the permalink post is a string, which allows an attacker to send a non-string value as the message of a permalink post and crash the frontend.

CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
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CVE-2024-45843

Weak SSRF Filtering

Mattermost versions 9.5.x <= 9.5.8 fail to include the metadata endpoints of Oracle Cloud and Alibaba in the SSRF denylist, which allows an attacker to possibly cause an SSRF if Mattermost was deployed in Oracle Cloud or Alibaba.

CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
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CVE-2024-45833

Mobile password gets saved in dictionary under conditions

Mattermost Mobile Apps versions <=2.18.0 fail to disable autocomplete during login while typing the password and visible password is selected, which allows the password to get saved in the dictionary when the user has Swiftkey as the default keyboard, the masking is off and the password contains a special character..

CVSS 3.1 · 4.5 Medium EPSS < 1% KEV · Not listed
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CVE-2024-39613

RCE in desktop app in Windows by local attacker

Mattermost Desktop App versions <=5.8.0 fail to specify an absolute path when searching the cmd.exe file, which allows a local attacker who is able to put an cmd.exe file in the Downloads folder of a user's machine to cause remote code execution on that machine.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
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Mattermost Desktop
CVE-2024-39837

Malicious remote can create arbitrary channels

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly restrict channel creation which allows a malicious remote to create arbitrary channels, when shared channels were enabled.

CVSS 3.1 · 3.8 Low EPSS < 1% KEV · Not listed
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CVE-2024-39839

Remote username set to an arbitrary string by remote user

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to disallow users to set their own remote username, when shared channels were enabled, which allows a user on a remote to set their remote username prop to an arbitrary string, which would be then synced to the local server as long as the user hadn't been synced before.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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CVE-2024-41144

Malicious remote can create/update/delete arbitrary posts in arbitrary channels

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to properly validate synced posts, when shared channels are enabled,  which allows a malicious remote to create/update/delete arbitrary posts in arbitrary channels

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
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CVE-2024-41162

Malicious remote can make an arbitrary local channel read-only

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5 and 9.8.x <= 9.8.1 fail to disallow the modification of local channels by a remote, when shared channels are enabled, which allows a malicious remote to make an arbitrary local channel read-only.

CVSS 3.1 · 4.1 Medium EPSS < 1% KEV · Not listed
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CVE-2024-41926

Malicious remote can claim that a user was synced from another remote

Mattermost versions 9.9.x <= 9.9.0 and 9.5.x <= 9.5.6 fail to validate the source of sync messages and only allow the correct remote IDs, which allows a malicious remote to set arbitrary RemoteId values for synced users and therefore claim that a user was synced from another remote.

CVSS 3.1 · 2.7 Low EPSS < 1% KEV · Not listed
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CVE-2024-32939

Email addresses of remote users visible in props regardless of server settings

Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0, 9.8.x <= 9.8.2, when shared channels are enabled, fail to redact remote users' original email addresses stored in user props when email addresses are otherwise configured not to be visible in the local server."

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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CVE-2024-39810

Server crash via Elasticsearch certificate file

Mattermost versions 9.5.x <= 9.5.7 and 9.10.x <= 9.10.0 fail to time limit and size limit the CA path file in the ElasticSearch configuration which allows a System Role with access to the Elasticsearch system console to add any file as a CA path field, such as /dev/zero and, after testing the connection, cause the application to crash.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed
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CVE-2024-39836

Munged email address used for password resets and notifications

Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to ensure that remote/synthetic users cannot create sessions or reset passwords, which allows the munged email addresses, created by shared channels, to be used to receive email notifications and to reset passwords, when they are valid, functional emails.

CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
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CVE-2024-40886

One-click Client-Side Path Traversal Leading to CSRF in User Management admin page

Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0, 9.8.x <= 9.8.2 fail to sanitize user inputs in the frontend that are used for redirection which allows for a one-click client-side path traversal that is leading to CSRF in User Management page of the system console.

CVSS 3.1 · 4.6 Medium EPSS < 1% KEV · Not listed
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CVE-2024-42411

User creation date manipulation in POST /api/v4/users

Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0, 9.8.x <= 9.8.2 fail to restrict the input in POST /api/v4/users which allows a user to manipulate the creation date in POST /api/v4/users tricking the admin into believing their account is much older.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
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CVE-2024-43813

IDOR when marking read a user's channel

Mattermost versions 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 fail to enforce proper access controls which allows any authenticated user, including guests, to mark any channel inside any team as read for any user.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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CVE-2024-8071

System Role with edit access to permissions can elevate themselves to system admin

Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to restrict which roles can promote a user as system admin which allows a System Role with edit access to the permissions section of system console to update their role (e.g. member) to include the `manage_system` permission, effectively becoming a System Admin.

CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed
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CVE-2024-29977

Malicious remote can create arbitrary reactions on arbitrary posts

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly validate synced reactions, when shared channels are enabled, which allows a malicious remote to create arbitrary reactions on arbitrary posts

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