PT-2026-82035

Mattermost doesn't restrict role updated websocket event broadcasts to members of the affected team or channel in github.com/mattermost/mattermost-server...

CVE-2026-16544

AWX security issue: the websocket event consumer omits RBAC checks for inventory_update_events, project_update_events, and system_job_events, allowing any authenticated user to subscribe to these unmapped groups and view real-time stdout from jobs in other organizations. Affected component is the...

Information Exposure

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Information Exposure via the roleupdated websocket event broadcast process. An attacker can gain unauthorized access to permission scheme change...

CVE-2026-2578 Information Disclosure via WebSocket Event When Deleting Unrevealed Burn on Read Posts

Mattermost versions 11.3.x = 11.3.0 fail to preserve the redacted state of burn-on-read posts during deletion which allows channel members to access unrevealed burn-on-read message contents via the WebSocket post deletion event.. Mattermost Advisory ID: MMSA-2026-00579...

CVE-2026-2578

Mattermost (version 11.3.x, affected range up to 11.3.0) has a vulnerability where the redacted state of burn-on-read posts is not preserved during deletion. This allows channel members to access unrevealed burn-on-read message contents via the WebSocket post deletion event. CVSS v3.1 base score ...

CVE-2026-2578 Information Disclosure via WebSocket Event When Deleting Unrevealed Burn on Read Posts

Mattermost versions 11.3.x = 11.3.0 fail to preserve the redacted state of burn-on-read posts during deletion which allows channel members to access unrevealed burn-on-read message contents via the WebSocket post deletion event.. Mattermost Advisory ID: MMSA-2026-00579...

EUVD-2019-11384

Malware in sbrugna...

EUVD-2023-33787

Malicious code in bioql PyPI...

CVE-2020-14457

An issue was discovered in Mattermost Server before 5.20.0. Non-members can receive broadcasted team details via the updateteam WebSocket event, aka MMSA-2020-0012...

BIT-MATTERMOST-2020-14457

An issue was discovered in Mattermost Server before 5.20.0. Non-members can receive broadcasted team details via the updateteam WebSocket event, aka MMSA-2020-0012...

BIT-MATTERMOST-2023-2281

When archiving a team, Mattermost fails to sanitize the related Websocket event sent to currently connected clients. This allows the clients to see the name, display name, description, and other data about the archived team...

Information Disclosure

github.com/mattermost/mattermost-server is vulnerable to Information Disclosure. The vulnerability exists because the library fails to sanitize the related WebSocket event sent to currently connected clients, which allows an attacker to see the name, display name, description, and other data when...

CVE-2023-2281

When archiving a team, Mattermost fails to sanitize the related Websocket event sent to currently connected clients. This allows the clients to see the name, display name, description, and other data about the archived team...

Sql injection

When archiving a team, Mattermost fails to sanitize the related Websocket event sent to currently connected clients. This allows the clients to see the name, display name, description, and other data about the archived team...

CVE-2023-2281: Exposure of Sensitive Information to an Unauthorized Actor

When archiving a team, Mattermost fails to sanitize the related Websocket event sent to currently connected clients. This allows the clients to see the name, display name, description, and other data about the archived team...

CVE-2019-20847

An issue was discovered in Mattermost Server before 5.18.0. An attacker can send a usertyping WebSocket event to any channel...

CVE-2019-20847

An issue was discovered in Mattermost Server before 5.18.0. An attacker can send a usertyping WebSocket event to any channel...

Design/Logic Flaw

An issue was discovered in Mattermost Server before 5.20.0. Non-members can receive broadcasted team details via the updateteam WebSocket event, aka MMSA-2020-0012...

Code injection

An issue was discovered in Mattermost Server before 5.18.0. An attacker can send a usertyping WebSocket event to any channel...

CVE-2019-20847

Mattermost Server prior to version 5.18.0 is affected. A vulnerability allows an attacker to send a user_typing WebSocket event to any channel, indicating improper handling of WebSocket events. The issue is documented across multiple feeds (e.g., Red Hat advisory, CNVD) and is mitigated by updati...