Low severityNVD Advisory· Published Oct 16, 2025· Updated Oct 16, 2025
Guest user can add unauthorized team users to private channels
CVE-2025-10545
Description
Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the /api/v4/channels/{channel_id}/members endpoint
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/mattermost/mattermost/server/v8Go | < 8.0.0-20250820115038-ff30b84049f0 | 8.0.0-20250820115038-ff30b84049f0 |
github.com/mattermost/mattermost-serverGo | >= 10.5.0, < 10.5.11 | 10.5.11 |
github.com/mattermost/mattermost-serverGo | >= 10.11.0, < 10.11.3 | 10.11.3 |
Affected products
4- ghsa-coords3 versionspkg:golang/github.com/mattermost/mattermost-serverpkg:golang/github.com/mattermost/mattermost/server/v8pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Tumbleweed
>= 10.5.0, < 10.5.11+ 2 more
- (no CPE)range: >= 10.5.0, < 10.5.11
- (no CPE)range: < 8.0.0-20250820115038-ff30b84049f0
- (no CPE)range: < 0.0.20251105T184115-1.1
- Range: 10.5.0
Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-424h-xj87-m937ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-10545ghsaADVISORY
- github.com/mattermost/mattermost/commit/fb9c583f5e466a566a5122154ef337bbf2238902ghsaWEB
- github.com/mattermost/mattermost/commit/ff30b84049f0193f0570d30e46cffc3602298c67ghsaWEB
- github.com/mattermost/mattermost/pull/31319ghsaWEB
- github.com/mattermost/mattermost/pull/33827ghsaWEB
- mattermost.com/security-updatesghsaWEB
News mentions
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