CVE-2025-53857

Lack of Authorization on Get Channel Subscriptions for Autocomplete in Mattermost Confluence Plugin

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.

Remediation

Solution:

  • Update Mattermost Confluence Plugin to version 1.5.0 or higher.

Category

3.7
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.03%
Affected: Mattermost Mattermost Confluence Plugin
Published at:
Updated at:

References

Link Tags
https://mattermost.com/security-updates

Frequently Asked Questions

What is the severity of CVE-2025-53857?
CVE-2025-53857 has been scored as a low severity vulnerability.
How to fix CVE-2025-53857?
To fix CVE-2025-53857: Update Mattermost Confluence Plugin to version 1.5.0 or higher.
Is CVE-2025-53857 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-53857 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-53857?
CVE-2025-53857 affects Mattermost Mattermost Confluence Plugin.
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