CVSS 3.1
4.3 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NCVE-2024-29977
Medium (4.3) in mattermost mattermost. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost/server/v8 9.5.7, 9.9.1.
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly validate synced reactions, when shared channels are enabled, which allows a malicious remote to create arbitrary reactions on arbitrary posts
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 20% 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-jq3g-xqpx-37x3 | Go | github.com/mattermost/mattermost/server/v8 | >=9.5.0 <9.5.7 | 9.5.7 |
| GHSA-jq3g-xqpx-37x3 | Go | github.com/mattermost/mattermost/server/v8 | >=9.9.0 <9.9.1 | 9.9.1 |
| GO-2024-3030 | Go | github.com/mattermost/mattermost-server | >=9.5.0+incompatible <9.5.7+incompatible >=9.9.0+incompatible <9.9.1+incompatible | 9.5.7+incompatible, 9.9.1+incompatible |
| GO-2024-3030 | Go | github.com/mattermost/mattermost-server/v5 | all versions | no fix published |
| GO-2024-3030 | Go | github.com/mattermost/mattermost-server/v6 | all versions | no fix published |
| GO-2024-3030 | Go | github.com/mattermost/mattermost/server/v8 | all versions | no fix published |