CVSS 3.1
9.6 criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:NCVE-2024-39777
Critical (9.6) in mattermost mattermost. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost/server/v8 9.5.7, 9.7.6, 9.8.1.
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5 and 9.8.x <= 9.8.1 fail to disallow unsolicited invites to expose access to local channels, when shared channels are enabled, which allows a malicious remote to send an invite with the ID of an existing local channel, and that local channel will then become shared without the consent of the local admin.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-31)
- CWE
- CWE-284
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-q22q-2rrf-m27p | Go | github.com/mattermost/mattermost/server/v8 | >=9.9.0 <9.9.1 | 9.9.1 |
| GHSA-q22q-2rrf-m27p | Go | github.com/mattermost/mattermost/server/v8 | >=9.5.0 <9.5.7 | 9.5.7 |
| GHSA-q22q-2rrf-m27p | Go | github.com/mattermost/mattermost/server/v8 | >=9.7.0 <9.7.6 | 9.7.6 |
| GHSA-q22q-2rrf-m27p | Go | github.com/mattermost/mattermost/server/v8 | >=9.8.0 <9.8.1 | 9.8.1 |
| GO-2024-3092 | Go | github.com/mattermost/mattermost-server | >=9.5.0+incompatible <9.5.7+incompatible >=9.7.0+incompatible <9.7.6+incompatible >=9.8.0+incompatible <9.8.1+incompatible >=9.9.0+incompatible <9.9.1+incompatible | 9.5.7+incompatible, 9.7.6+incompatible, 9.8.1+incompatible, 9.9.1+incompatible |
| GO-2024-3092 | Go | github.com/mattermost/mattermost-server/v5 | all versions | no fix published |
| GO-2024-3092 | Go | github.com/mattermost/mattermost-server/v6 | all versions | no fix published |
| GO-2024-3092 | Go | github.com/mattermost/mattermost/server/v8 | all versions | no fix published |