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The CVE-2025-XXXX vulnerability in the Mattermost Confluence Plugin (versions < 1.5.0) stems from improper authorization checks when handling API requests. The plugin fails to validate whether a user has sufficient permissions before processing requests to create channel subscriptions. Attackers can exploit this flaw by sending crafted API calls to the subscription endpoint, allowing unauthorized creation of channel subscriptions even without proper access. This weakness in access control could lead to unintended data exposure or disruption in channel management.
DailyCVE Form:
Platform: Mattermost Confluence Plugin
Version: < 1.5.0
Vulnerability: Missing Authorization
Severity: Moderate
Date: Aug 11, 2025
Prediction: Patch by Sep 2025
What Undercode Say:
Check plugin version $ mmctl plugin list | grep confluence Verify API endpoint exposure $ curl -X POST http://<mattermost-server>/plugins/confluence/api/v1/subscribe Log inspection $ journalctl -u mattermost --no-pager | grep "unauthorized subscription"
How Exploit:
- Send unauthenticated POST request to
/plugins/confluence/api/v1/subscribe. - Manipulate channel ID parameter to bypass checks.
- Flood target channels with unauthorized subscriptions.
Protection from this CVE:
- Upgrade to v1.5.0 immediately.
- Restrict plugin API access via firewall rules.
- Audit existing subscriptions for anomalies.
Impact:
- Unauthorized channel spamming.
- Potential data leakage via subscriptions.
- Disruption of legitimate workflows.
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Sources:
Reported By: github.com
Extra Source Hub:
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