High severity8.7NVD Advisory· Published Aug 1, 2024· Updated Jun 17, 2026
CVE-2024-39777
CVE-2024-39777
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/mattermost/mattermost/server/v8Go | >= 9.9.0, < 9.9.1 | 9.9.1 |
github.com/mattermost/mattermost/server/v8Go | >= 9.5.0, < 9.5.7 | 9.5.7 |
github.com/mattermost/mattermost/server/v8Go | >= 9.7.0, < 9.7.6 | 9.7.6 |
github.com/mattermost/mattermost/server/v8Go | >= 9.8.0, < 9.8.1 | 9.8.1 |
Affected products
4cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*range: >=9.5.0,<9.5.7
- cpe:2.3:a:mattermost:mattermost:9.9.0:*:*:*:*:*:*:*
- (no CPE)range: 9.9.0
Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-q22q-2rrf-m27pghsaADVISORY
- mattermost.com/security-updatesnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2024-39777ghsaADVISORY
News mentions
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