CVE-2025-55073
Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL in github.com/mattermost/mattermost-server
5.4
MEDIUM
CVSS 3.1
EPSS 0.04%
Description
Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL in github.com/mattermost/mattermost-server
How to fix CVE-2025-55073
To remediate CVE-2025-55073, upgrade the affected package to a fixed version below.
- —upgrade to 10.11.4 or later
- —upgrade to 10.5.12+incompatible or later
- —no fix listed
- —no fix listed
- —upgrade to 8.0.0-20250929212932-a41db04d2746 or later
- —upgrade to 8.0.0-20250929212932-a41db04d2746 or later
Is CVE-2025-55073 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- >= 10.11.0, < 10.11.4
- >= 10.5.0+incompatible, < 10.5.12+incompatible, >= 10.11.0+incompatible, < 10.11.4+incompatible, >= 10.12.0+incompatible, < 10.12.1+incompatible
- from 0
- from 0
- from 0, < 8.0.0-20250929212932-a41db04d2746
- from 0, < 8.0.0-20250929212932-a41db04d2746
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |