CVE-2026-84715
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
FeatherPanel
PublishedSep 2, 2026
First seenSep 2, 2026
Weakness typeCWE-862Missing authorization
How to fix
Update
- MythicalLTD FeatherPanel1.3.7.10 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| MythicalLTD FeatherPanel | v < 1.3.7.10 | 1.3.7.10 |
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