| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/mattermost/mattermost-server | ≥ 10.10.0, < 10.10.2≥ 10.10.0+incompatible, < 10.10.2+incompatible≥ 10.5.0, < 10.5.10≥ 10.5.0+incompatible, < 10.5.10+incompatible≥ 10.9.0, < 10.9.5≥ 10.9.0+incompatible, < 10.9.5+incompatible | 10.10.210.10.2+incompatible10.5.1010.5.10+incompatible10.9.510.9.5+incompatible |
| github.com/mattermost/mattermost-server/v5 | all versions | |
| github.com/mattermost/mattermost-server/v6 | all versions | |
| github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250731063404-9eebaadf8f72 | 8.0.0-20250731063404-9eebaadf8f72 |
| mattermost server | ≥ 10.10.0, < 10.10.2≥ 10.5.0, < 10.5.10≥ 10.9.0, < 10.9.5 | 10.10.210.5.1010.9.5 |
Mattermost versions 10.10.x <= 10.10.1, 10.5.x <= 10.5.9, 10.9.x <= 10.9.4 fail to validate the redirect_to parameter, allowing an attacker to craft a malicious link that, once a user authenticates with their SAML provider, could post the user’s cookies to an attacker-controlled URL.
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