High severity8.8NVD Advisory· Published Sep 2, 2026
CVE-2026-84715
CVE-2026-84715
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.
Affected products
1- Range: <1.3.7.10
Patches
Vulnerability mechanics
References
5- github.com/MythicalLTD/FeatherPanel/blob/376b003aa9685b74153d239d2b3f64a752cdc0f0/backend/app/Controllers/User/Server/SubuserController.phpnvd
- github.com/MythicalLTD/FeatherPanel/blob/376b003aa9685b74153d239d2b3f64a752cdc0f0/backend/app/Helpers/ServerGateway.phpnvd
- github.com/MythicalLTD/FeatherPanel/commit/06ef8dcac471201748516ca743694159cb846a9dnvd
- github.com/MythicalLTD/FeatherPanel/releases/tag/v1.3.7.10nvd
- www.vulncheck.com/advisories/featherpanel-before-1.3.7.10-privilege-escalation-via-subuser-permission-updatenvd
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