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The CVE-2025-XXXX vulnerability in Mattermost Confluence Plugin versions before 1.5.0 stems from improper authorization checks in the subscription creation endpoint. When a user attempts to subscribe to a Confluence space, the plugin fails to verify whether the user has legitimate access rights to that space. This allows an attacker to craft a malicious API request to the `/create-subscription` endpoint, linking their Mattermost account to a restricted Confluence space without proper validation. The exploit leverages insufficient server-side validation, enabling unauthorized data access through the plugin’s integration layer.
DailyCVE Form:
Platform: Mattermost Confluence Plugin
Version: < 1.5.0
Vulnerability: Missing Authorization
Severity: Moderate
Date: Aug 11, 2025
Prediction: Patch expected by Sep 1, 2025
What Undercode Say:
curl -X POST https://target.com/create-subscription -d '{"space_id":"RESTRICTED_SPACE"}'
import requests
requests.post("https://target.com/create-subscription", json={"space_id":"RESTRICTED_SPACE"})
How Exploit:
- Send unauthenticated POST request to
/create-subscription. - Specify unauthorized `space_id` in payload.
- Bypass access checks.
Protection from this CVE:
- Upgrade to v1.5.0.
- Implement proper authorization checks.
- Restrict subscription API endpoints.
Impact:
- Unauthorized Confluence space access.
- Data leakage risk.
- Integration abuse.
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Sources:
Reported By: github.com
Extra Source Hub:
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