# CVE-2025-14350: Information disclosure via channel mentions in posts

> CVE-2025-14350: Information disclosure via channel mentions in posts. CVSS 4.3 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-14350
Last updated: 2026-06-17T08:35:47Z

- Published: 2026-02-16 12:05 UTC · Updated: 2026-06-17 08:35 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:L/I:N/A:N
- EPSS: 0.19%, 8th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-862

## Description

Mattermost versions 11.1.x \<= 11.1.2, 10.11.x \<= 10.11.9, 11.2.x \<= 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the channel\_mentions property in the API response. Mattermost Advisory ID: MMSA-2025-00563

## 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-2025-14350)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-14350)
- [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-2025-14350 · Markdown: https://rewindex.com/cve/CVE-2025-14350.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-14350 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:14.284Z