# CVE-2025-6227: Invite token is used as part of the secure communication

> CVE-2025-6227: Invite token is used as part of the secure communication. CVSS 2.2 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-6227
Last updated: 2026-06-17T10:01:25Z

- Published: 2025-07-18 11:39 UTC · Updated: 2026-06-17 10:01 UTC · Assigner: Mattermost
- CVSS: 2.2 (CVSS 3.1) · Severity: Low · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N
- EPSS: 0.22%, 12th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-522

## Description

Mattermost versions 10.5.x \<= 10.5.7, 9.11.x \<= 9.11.16 fail to negotiate a new token when accepting the invite which allows a user that intercepts both invite and password to send synchronization payloads to the server that originally created the invite via the REST API.

## Affected vendors and products

- Mattermost: Mattermost

## Tracked companies

- [Mattermost](https://rewindex.com/company/mattermost.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-6227)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-6227)
- [https://mattermost.com/security-updates](https://mattermost.com/security-updates)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-6227 · Markdown: https://rewindex.com/cve/CVE-2025-6227.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-6227 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:42.071Z