Описание
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate that a remote cluster has access to a channel before processing membership removal requests during shared channel membership sync, which allows a malicious remote cluster to remove any user from any channel, including private channels, via crafted membership sync messages targeting channels the remote cluster is not authorized to access. Mattermost Advisory ID: MMSA-2026-00576
Ссылки
- Vendor Advisory
Уязвимые конфигурации
Конфигурация 1Версия от 10.11.0 (включая) до 10.11.14 (исключая)Версия от 11.4.0 (включая) до 11.4.4 (исключая)Версия от 11.5.0 (включая) до 11.5.2 (исключая)
Одно из
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
EPSS
Процентиль: 5%
0.00152
Низкий
4.3 Medium
CVSS3
Дефекты
CWE-863
Связанные уязвимости
CVSS3: 4.3
debian
3 месяца назад
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 1 ...
CVSS3: 4.3
github
3 месяца назад
Mattermost does not verify remote cluster channel access when processing shared channel membership removals
EPSS
Процентиль: 5%
0.00152
Низкий
4.3 Medium
CVSS3
Дефекты
CWE-863