# CVE-2025-53857: Lack of Authorization on Get Channel Subscriptions for Autocomplete in Mattermost Confluence Plugin

> CVE-2025-53857: Lack of Authorization on Get Channel Subscriptions for Autocomplete in Mattermost Confluence Plugin. CVSS 3.7 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-53857
Last updated: 2026-06-17T09:39:02Z

- Published: 2025-08-11 18:57 UTC · Updated: 2026-06-17 09:39 UTC · Assigner: Mattermost
- CVSS: 3.7 (CVSS 3.1) · Severity: Low · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS: 0.21%, 11th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-862

## Description

Mattermost Confluence Plugin version \<1.5.0 fails to check the access of the user to the channel which allows attackers to get channel subscription details without proper access to the channel via API call to the GET autocomplete/GetChannelSubscriptions endpoint.

## Affected vendors and products

- Mattermost: Mattermost Confluence Plugin

## Tracked companies

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

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-53857)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-53857)
- [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-2025-53857 · Markdown: https://rewindex.com/cve/CVE-2025-53857.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-53857 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:26.308Z