GO-2026-4302
NoneCVSS
—
EPSS
—
Published
Jan 13, 2026
CISA due date
—
The record
Mattermost Server vulnerable to XSS via an uploaded file in github.com/mattermost/mattermost-server
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | 0 | 3.9.2+incompatible |
| Go | github.com/mattermost/mattermost-server | 0 | 3.9.2 |
| Go | github.com/mattermost/mattermost-server | 3.10.0 | 3.10.2 |
| go | github.com/mattermost/mattermost-server | 3.10.0 | 3.10.2 |
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