CVE-2026-84715: Missing Authorization in MythicalLTD FeatherPanel
Description
FeatherPanel versions before 1.3.7.10 fail to validate permissions in the SubuserController updateSubuser handler, allowing authenticated subusers to modify their own permission records. A subuser with minimal permissions can send a crafted request to grant themselves full server control, enabling unauthorized access to sensitive data, backups, and server configuration.
CVSS v4.0
Score 8.7high
Affected software
MythicalLTD
FeatherPanel
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-84715 is a missing authorization vulnerability in MythicalLTD's FeatherPanel affecting versions prior to 1.3.7.10. The SubuserController's updateSubuser handler does not properly validate permissions, enabling authenticated subusers to craft requests that escalate their privileges to full server control. This unauthorized access can compromise sensitive server data and configurations.
Potential Impact
An attacker with minimal subuser permissions can exploit this vulnerability to gain full control over the server. This includes unauthorized access to sensitive data, backups, and server configuration settings, potentially leading to significant security breaches and operational disruptions.
Mitigation Recommendations
Upgrade FeatherPanel to version 1.3.7.10 or later, where this authorization issue has been fixed. No other mitigation is indicated as the fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-02T01:03:07.317Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a977df2acd9273b49968678
Added to database: 09/02/2026, 01:37:54 UTC
Last enriched: 09/25/2026, 02:45:57 UTC
Last updated: 10/15/2026, 18:48:24 UTC
Views: 76
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