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Mattermost

mattermost

Vendor: Mattermost • 78 CVEs

CVEs (78)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
1Mattermost
1Mattermost
Jun 17, 2026
Mar 22, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Mattermost fails to check the "Show Full Name" setting when rendering the result for the /plugins/focalboard/api/v2/users API call, allowing an attacker to learn the full name of a board owner.
1Mattermost
1Mattermost
Jun 17, 2026
Feb 27, 2023
N/A· v4
6.5 MEDIUM· v3
N/A· v2
A missing permissions check in Mattermost Playbooks in Mattermost allows an attacker to modify a playbook via the /plugins/playbooks/api/v0/playbooks/[playbookID] API.
1Mattermost
1Mattermost
Jun 17, 2026
Feb 27, 2023
N/A· v4
6.5 MEDIUM· v3
N/A· v2
A missing permissions check in the /plugins/playbooks/api/v0/runs API in Mattermost allows an attacker to list and view playbooks belonging to a team they are not a member of.
1Mattermost
1Mattermost
Jun 17, 2026
Nov 23, 2022
N/A· v4
6.5 MEDIUM· v3
N/A· v2
A denial-of-service vulnerability in the Mattermost allows an authenticated user to crash the server via multiple requests to one of the API endpoints which could fetch a large amount of data. 
1Mattermost
1Mattermost
Jun 17, 2026
Nov 23, 2022
N/A· v4
6.5 MEDIUM· v3
N/A· v2
A denial-of-service vulnerability in Mattermost allows an authenticated user to crash the server via multiple large autoresponder messages.
1Mattermost
1Mattermost
Jun 17, 2026
Nov 23, 2022
N/A· v4
6.5 MEDIUM· v3
N/A· v2
A denial-of-service vulnerability in the Mattermost Playbooks plugin allows an authenticated user to crash the server via multiple large requests to one of the Playbooks API endpoints.
1Mattermost
1Mattermost
Jun 17, 2026
Jul 14, 2022
N/A· v4
4.3 MEDIUM· v3
4.0 MEDIUM· v2
The Guest account feature in Mattermost version 6.7.0 and earlier fails to properly restrict the permissions, which allows a guest user to fetch a list of all public channels in the team, in spite of not being part of th...Show more
The Guest account feature in Mattermost version 6.7.0 and earlier fails to properly restrict the permissions, which allows a guest user to fetch a list of all public channels in the team, in spite of not being part of those channels.Show less
1Mattermost
1Mattermost
Jun 17, 2026
Jul 14, 2022
N/A· v4
6.5 MEDIUM· v3
4.0 MEDIUM· v2
The legacy Slack import feature in Mattermost version 6.7.0 and earlier fails to properly limit the sizes of imported files, which allows an authenticated attacker to crash the server by importing large files via the Sla...Show more
The legacy Slack import feature in Mattermost version 6.7.0 and earlier fails to properly limit the sizes of imported files, which allows an authenticated attacker to crash the server by importing large files via the Slack import REST API.Show less
1Mattermost
1Mattermost
Jun 17, 2026
Mar 18, 2022
N/A· v4
4.9 MEDIUM· v3
4.0 MEDIUM· v2
One of the API in Mattermost version 6.3.0 and earlier fails to properly protect the permissions, which allows the system administrators to combine the two distinct privileges/capabilities in a way that allows them to ov...Show more
One of the API in Mattermost version 6.3.0 and earlier fails to properly protect the permissions, which allows the system administrators to combine the two distinct privileges/capabilities in a way that allows them to override certain restricted configurations like EnableUploads.Show less
1Mattermost
1Mattermost
Jun 17, 2026
Mar 18, 2022
N/A· v4
5.4 MEDIUM· v3
3.5 LOW· v2
Mattermost 6.3.0 and earlier fails to properly sanitize the HTML content in the email invitation sent to guest users, which allows registered users with special permissions to invite guest users to inject unescaped HTML...Show more
Mattermost 6.3.0 and earlier fails to properly sanitize the HTML content in the email invitation sent to guest users, which allows registered users with special permissions to invite guest users to inject unescaped HTML content in the email invitations.Show less
1Mattermost
1Mattermost
Jun 17, 2026
Feb 21, 2022
N/A· v4
6.5 MEDIUM· v3
4.0 MEDIUM· v2
Mattermost 6.3.0 and earlier fails to protect email addresses of the creator of the team via one of the APIs, which allows authenticated team members to access this information resulting in sensitive & private informatio...Show more
Mattermost 6.3.0 and earlier fails to protect email addresses of the creator of the team via one of the APIs, which allows authenticated team members to access this information resulting in sensitive & private information disclosure.Show less
1Mattermost
1Mattermost
Jun 17, 2026
Jan 18, 2022
N/A· v4
5.7 MEDIUM· v3
3.5 LOW· v2
Mattermost 6.2 and earlier fails to sufficiently process a specifically crafted GIF file when it is uploaded while drafting a post, which allows authenticated users to cause resource exhaustion while processing the file,...Show more
Mattermost 6.2 and earlier fails to sufficiently process a specifically crafted GIF file when it is uploaded while drafting a post, which allows authenticated users to cause resource exhaustion while processing the file, resulting in server-side Denial of Service.Show less
1Mattermost
1Mattermost
Jun 17, 2026
Jan 18, 2022
N/A· v4
6.5 MEDIUM· v3
4.0 MEDIUM· v2
Mattermost 6.1 and earlier fails to sufficiently validate permissions while viewing archived channels, which allows authenticated users to view contents of archived channels even when this is denied by system administrat...Show more
Mattermost 6.1 and earlier fails to sufficiently validate permissions while viewing archived channels, which allows authenticated users to view contents of archived channels even when this is denied by system administrators by directly accessing the APIs.Show less
1Mattermost
1Mattermost
Jun 17, 2026
Dec 9, 2021
N/A· v4
7.5 HIGH· v3
5.0 MEDIUM· v2
Mattermost 6.0.2 and earlier fails to sufficiently sanitize user's password in audit logs when user creation fails.
1Mattermost
1Mattermost
Jun 17, 2026
Sep 22, 2021
N/A· v4
6.1 MEDIUM· v3
2.6 LOW· v2
Mattermost 5.38 and earlier fails to sufficiently sanitize clipboard contents, which allows a user-assisted attacker to inject arbitrary web script in product deployments that explicitly disable the default CSP.
1Mattermost
1Mattermost
Jun 17, 2026
Aug 5, 2021
N/A· v4
6.1 MEDIUM· v3
4.3 MEDIUM· v2
Fixed a bypass for a reflected cross-site scripting vulnerability affecting OAuth-enabled instances of Mattermost.
1Mattermost
1Mattermost
Jun 17, 2026
Jun 26, 2020
N/A· v4
7.5 HIGH· v3
5.0 MEDIUM· v2
An issue was discovered in Mattermost Mobile Apps before 1.31.2 on iOS. Unintended third-party servers could sometimes obtain authorization tokens, aka MMSA-2020-0022.
1Mattermost
1Mattermost
Jun 17, 2026
Jun 19, 2020
N/A· v4
9.1 CRITICAL· v3
6.4 MEDIUM· v2
An issue was discovered in Mattermost Mobile Apps before 1.26.0. An attacker can use directory traversal with the Video Preview feature to overwrite arbitrary files on a device.