GHSA-mxq2-5jpg-7474
Mattermost doesn't validate channel ownership of an existing subscription before applying edits
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | >= 11.7.0, < 11.7.1 | 11.7.1 |
| Go | github.com/mattermost/mattermost-server | >= 11.6.0, < 11.6.3 | 11.6.3 |
| Go | github.com/mattermost/mattermost-server | >= 11.5.0, < 11.5.6 | 11.5.6 |
| Go | github.com/mattermost/mattermost-server | >= 10.11.0, < 10.11.18 | 10.11.18 |
Details
As written in the advisory (Markdown source, shown as plain text).
Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 Fail to validate channel ownership of an existing subscription before applying edits which allows an authenticated attacker to hijack subscriptions from channels they have no access to via a crafted PUT request to the subscription edit endpoint.. Mattermost Advisory ID: MMSA-2026-00650
References
External links from the advisory. They lead to third-party sites.