CVE-2025-53857lowCWE-862

CVE-2025-53857: low-severity vulnerability in Mattermost Confluence Plugin

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

Published

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8Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 3.7epss 0.2%
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
Mattermost · Mattermost Confluence Plugin
Related CVEs — Mattermost Confluence Plugin

In the same product, most dangerous first.

CVE-2025-54525HIGHUnexpected input to Create Channel Subscription endpoint causes DoS in Mattermost Confluence PluginEPSS 0.4%CVE-2025-52931HIGHUnexpected input to Update Channel Subscription endpoint causes DoS in Mattermost Confluence PluginEPSS 0.4%CVE-2025-54463MEDIUMUnexpected Input to Cloud Webhook endpoint Causes DoS in Mattermost Confluence PluginEPSS 0.3%CVE-2025-53514MEDIUMUnexpected Input to Server Webhook endpoint Causes DoS in Mattermost Confluence PluginEPSS 0.3%CVE-2025-49221LOWUnauthenticated Access to Channel Subscription in Mattermost Confluence PluginEPSS 0.3%CVE-2025-54478HIGHUnauthenticated Channel Subscription Edit in Mattermost Confluence PluginEPSS 0.3%