# CVE-2025-47871: Mattermost Playbooks exposes private channel metadata to unauthorized users via run metadata API

> CVE-2025-47871: Mattermost Playbooks exposes private channel metadata to unauthorized users via run metadata API. CVSS 4.3 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-47871
Last updated: 2026-06-17T09:28:47Z

- Published: 2025-06-30 16:51 UTC · Updated: 2026-06-17 09:28 UTC · Assigner: Mattermost
- CVSS: 4.3 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- EPSS: 0.20%, 10th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-863

## Description

Mattermost versions 10.5.x \<= 10.5.5, 9.11.x \<= 9.11.15, 10.8.x \<= 10.8.0, 10.7.x \<= 10.7.2, 10.6.x \<= 10.6.5 fail to properly validate channel membership when retrieving playbook run metadata, allowing authenticated users who are playbook members but not channel members to access sensitive information about linked private channels including channel name, display name, and participant count through the run metadata API endpoint.

## 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-2025-47871)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-47871)
- [https://mattermost.com/security-updates](https://mattermost.com/security-updates)

---

_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/)_


---
Canonical: https://rewindex.com/cve/CVE-2025-47871 · Markdown: https://rewindex.com/cve/CVE-2025-47871.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-47871 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:03:30.495Z