Mattermost: >> Mattermost Server >> 9.2.1 Security Vulnerabilities
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 and to crash the server due to overloading when clients attempt to retrive the aforementioned post.
CVSS Score
4.3
EPSS Score
0.003
Published
2024-02-09
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/<team-id>/channels/deleted endpoint.
CVSS Score
4.3
EPSS Score
0.002
Published
2024-01-02
Mattermost fails to perform correct authorization checks when creating a playbook action, allowing users without access to the playbook to create playbook actions. If the playbook action created is to post a message in a channel based on specific keywords in a post, some playbook information, like the name, can be leaked.
CVSS Score
3.1
EPSS Score
0.003
Published
2023-12-12
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 Score
4.3
EPSS Score
0.001
Published
2023-12-12
Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team, got permissions to the playbook and was then removed from the team.
CVSS Score
3.7
EPSS Score
0.002
Published
2023-12-12
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 Score
6.5
EPSS Score
0.002
Published
2023-12-12
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 Score
4.3
EPSS Score
0.001
Published
2023-12-12
Mattermost fails to validate if a relative path is passed in /plugins/playbooks/api/v0/telemetry/run/<telem_run_id> as a telemetry run ID, allowing an attacker to use a path traversal payload that points to a different endpoint leading to a CSRF attack.
CVSS Score
7.3
EPSS Score
0.002
Published
2023-12-12
Mattermost fails to to check the length when setting the title in a run checklist in Playbooks, allowing an attacker to send a specially crafted request and crash the Playbooks plugin
CVSS Score
4.3
EPSS Score
0.001
Published
2023-12-12
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