Medium severity6.5OSV Advisory· Published Dec 17, 2025· Updated Jun 17, 2026
CVE-2025-12689
CVE-2025-12689
Description
Mattermost versions 11.0.x <= 11.0.4, 10.12.x <= 10.12.2, 10.11.x <= 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request.
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-plugin-callsGo | < 1.11.0 | 1.11.0 |
Affected products
5@mattermost/[email protected], @mattermost/[email protected], @mattermost/[email protected], …+ 1 more
- (no CPE)range: @mattermost/[email protected], @mattermost/[email protected], @mattermost/[email protected], …
- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: >=10.11.0,<10.11.7
- ghsa-coords3 versionspkg:golang/github.com/mattermost/mattermost-plugin-callspkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
< 1.11.0+ 2 more
- (no CPE)range: < 1.11.0
- (no CPE)range: < 0.0.20251230T014957-150000.1.134.1
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-j5vq-62gr-8v3rghsaADVISORY
- mattermost.com/security-updatesnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2025-12689ghsaADVISORY
- github.com/mattermost/mattermost-plugin-calls/commit/f68b41980e1274e05cf91c687e2af1a73c5e36caghsaWEB
News mentions
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