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Medium 4.3
Permalink previews displayed for posts in archived channels even if users are disallowed to view archived channels
Mattermost fails to check whether the “Allow users to view archived channels” setting is enabled during permalink previews display, allowing members to view permalink previews of archived channels even if the “Allow users to view archived channels” setting …
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Medium 4.3
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.
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Medium 4.3
Denial of Service via specially crafted block fields in Mattermost Boards
Mattermost fails to properly limit the characters allowed in different fields of a block in Mattermost Boards allowing a attacker to consume excessive resources, possibly leading to Denial of Service, by patching the field of a block using a specially crafted…
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Medium 4.3
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…
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Medium 4.3
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.
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Medium 4.3
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 i…
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Medium 5.3
Denial of Service via Link Preview in /api/v4/redirect_location
Mattermost fails to properly sanitize the request to /api/v4/redirect_location allowing an attacker, sending a specially crafted request to /api/v4/redirect_location, to fill up the memory due to caching large items.
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Medium 4.9CVE-2023-5968 Public exploit
Password hash in response body after username update
Mattermost fails to properly sanitize the user object when updating the username, resulting in the password hash being included in the response body.
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Medium 4.3
Denial of Service via crashing the Calls Plugin
Mattermost fails to properly validate requests to the Calls plugin, allowing an attacker sending a request without a User Agent header to cause a panic and crash the Calls plugin
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Medium 6.5
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
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Medium 4.9
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.
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Medium 6.5
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 tempor…