Github.Com Mattermost Mattermost Server V8 vulnerabilities

CVE-2024-39837 [LOW] CWE-284 Mattermost did not properly restrict channel creation Mattermost did not properly restrict channel creation 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.

CVE-2024-2447 [HIGH] CWE-284 Mattermost fails to authenticate the source of certain types of post actions Mattermost fails to authenticate the source of certain types of post actions Mattermost versions 8.1.x before 8.1.11, 9.3.x before 9.3.3, 9.4.x before 9.4.4, and 9.5.x before 9.5.2 fail to authenticate the source of certain types of post actions, allowing an authenticated attacker to create posts as other users via a crafted post action.

CVE-2024-29221 [MEDIUM] CWE-284 Mattermost Server Improper Access Control Mattermost Server Improper Access Control Improper Access Control in Mattermost Server versions 9.5.x before 9.5.2, 9.4.x before 9.4.4, 9.3.x before 9.3.3, 8.1.x before 8.1.11 lacked proper access control in the `/api/v4/users/me/teams` endpoint allowing a team admin to get the invite ID of their team, thus allowing them to invite users, even if the "Add Members" permission was explicitly removed from team admins.

CVE-2024-28949 [MEDIUM] CWE-400 Mattermost Server doesn't limit the number of user preferences Mattermost Server doesn't limit the number of user preferences Mattermost Server versions 9.5.x before 9.5.2, 9.4.x before 9.4.4, 9.3.x before 9.3.3, 8.1.x before 8.1.11 don't limit the number of user preferences which allows an attacker to send a large number of user preferences potentially causing denial of service.

CVE-2024-21848 [LOW] CWE-273 Mattermost Server Improper Access Control Mattermost Server Improper Access Control Improper Access Control in Mattermost Server versions 8.1.x before 8.1.11 allows an attacker that is in a channel with an active call to keep participating in the call even if they are removed from the channel

CVE-2024-28053 [LOW] CWE-400 Mattermost Server Resource Exhaustion Mattermost Server Resource Exhaustion Resource Exhaustion in Mattermost Server versions 8.1.x before 8.1.10 fails to limit the size of the payload that can be read and parsed allowing an attacker to send a very large email payload and crash the server.

CVE-2024-1887 [HIGH] CWE-284 Mattermost post fetching without auditing in compliance export Mattermost post fetching without auditing in compliance export Mattermost fails to check if compliance export is enabled when fetching posts of public channels allowing a user that is not a member of the public channel to fetch the posts, which will not be audited in the compliance export.

CVE-2024-1942 [MEDIUM] CWE-284 Mattermost allows attackers access to posts in channels they are not a member of Mattermost allows attackers access to posts in channels they are not a member of Mattermost versions 8.1.x before 8.1.9, 9.2.x before 9.2.5, and 9.3.0 fail to sanitize the metadata on posts containing permalinks under specific conditions, which allows an authenticated attacker to access the contents of individual posts in channels they are not a member of.

CVE-2024-1953 [MEDIUM] CWE-400 Mattermost fails to limit the number of role names Mattermost fails to limit the number of role names Mattermost versions 8.1.x before 8.1.9, 9.2.x before 9.2.5, 9.3.0, and 9.4.x before 9.4.2 fail to limit the number of role names requested from the API, allowing an authenticated attacker to cause the server to run out of memory and crash by issuing an unusually large HTTP request.

CVE-2024-23493 [MEDIUM] CWE-200 Mattermost leaks details of AD/LDAP groups of a teams Mattermost leaks details of AD/LDAP groups of a teams Mattermost fails to properly authorize the requests fetching team associated AD/LDAP groups, allowing a user to fetch details of AD/LDAP groups of a team that they are not a member of.

CVE-2024-1888 [MEDIUM] CWE-284 Mattermost fails to check the "invite_guest" permission Mattermost fails to check the "invite_guest" permission Mattermost fails to check the "invite_guest" permission when inviting guests of other teams to a team, allowing a member with permissions to add other members but not to add guests to add a guest to a team as long as the guest was already a guest in another team of the server

CVE-2024-24988 [MEDIUM] CWE-400 Mattermost denial of service through long emoji value Mattermost denial of service through long emoji value Mattermost fails to properly validate the length of the emoji value in the custom user status, allowing an attacker to send multiple times a very long string as an emoji value causing high resource consumption and possibly crashing the server.

CVE-2024-1949 [LOW] CWE-200 Mattermost race condition Mattermost race condition A race condition in Mattermost versions 8.1.x before 8.1.9, and 9.4.x before 9.4.2 allows an authenticated attacker to gain unauthorized access to individual posts' contents via carefully timed post creation while another user deletes posts.

CVE-2024-1952 [LOW] CWE-200 Mattermost incorrectly allows access individual posts Mattermost incorrectly allows access individual posts Mattermost version 8.1.x before 8.1.9 fails to sanitize data associated with permalinks when a plugin updates an ephemeral post, allowing an authenticated attacker who can control the ephemeral post update to access individual posts' contents in channels they are not a member of.

CVE-2024-23488 [LOW] CWE-284 Mattermost fails to properly restrict the access of files attached to posts Mattermost fails to properly restrict the access of files attached to posts Mattermost fails to properly restrict the access of files attached to posts in an archived channel, resulting in members being able to access files of archived channels even if the “Allow users to view archived channels” option is disabled.

CVE-2024-1402 [MEDIUM] CWE-400 Mattermost vulnerable to denial of service via large number of emoji reactions Mattermost vulnerable to denial of service via large number of emoji reactions Mattermost fails to check if a custom emoji reaction exists when sending it to a post and to limit the amount of custom emojis allowed to be added in a post, allowing an attacker sending a huge amount of non-existent custom emojis in a post to crash the mobile app of a user seeing the post. Fetching posts wit

CVE-2024-24776 [LOW] CWE-284 Mattermost fails to check the required permissions Mattermost fails to check the required permissions Mattermost fails to check the required permissions in the POST /api/v4/channels/stats/member_count API resulting in channel member counts being leaked to a user without permissions.

CVE-2023-47858 [MEDIUM] CWE-284 Mattermost viewing archived public channels permissions vulnerability Mattermost viewing archived public channels permissions vulnerability Mattermost fails to properly verify the permissions needed for viewing archived public channels, allowing a member of one team to get details about the archived public channels of another team via the GET /api/v4/teams//channels/deleted endpoint.

CVE-2023-48732 [MEDIUM] CWE-200 Mattermost notified all users in the channel when using WebSockets to respond individually Mattermost notified all users in the channel when using WebSockets to respond individually Mattermost fails to scope the WebSocket response around notified users to a each user separately resulting in the WebSocket broadcasting the information about who was notified about a post to everyone else in the channel.

CVE-2023-50333 [LOW] CWE-284 Mattermost allows demoted guests to change group names Mattermost allows demoted guests to change group names Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.