CVSS 3.1
4.3 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NCVE-2017-18872
Medium (4.3) in mattermost mattermost server. EPSS 0.6% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost-server 4.3.3, 4.3.3+incompatible, 4.4.3.
An issue was discovered in Mattermost Server before 4.4.3 and 4.3.3. Attackers could reconfigure an OAuth app in some cases where Mattermost is an OAuth 2.0 service provider.
Severity
- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-31)
- CWE
- CWE-732
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-hgrp-fgm8-56g8 | Go | github.com/mattermost/mattermost-server | <4.3.3 | 4.3.3 |
| GHSA-hgrp-fgm8-56g8 | Go | github.com/mattermost/mattermost-server | >=4.4.0-rc1 <4.4.3 | 4.4.3 |
| GO-2025-4075 | Go | github.com/mattermost/mattermost-server | <4.3.3+incompatible >=4.4.0-rc1+incompatible <4.4.3+incompatible | 4.3.3+incompatible, 4.4.3+incompatible |