CVE-2026-84715
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 4.0
- 8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.32% probability · 25th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-862
- Source
- disclosure@vulncheck.com
References
- https://github.com/MythicalLTD/FeatherPanel
- https://github.com/MythicalLTD/FeatherPanel/blob/376b003aa9685b74153d239d2b3f64a752cdc0f0/backend/app/Controllers/User/Server/SubuserController.php#L454
- https://github.com/MythicalLTD/FeatherPanel/blob/376b003aa9685b74153d239d2b3f64a752cdc0f0/backend/app/Helpers/ServerGateway.php
- https://github.com/MythicalLTD/FeatherPanel/commit/06ef8dcac471201748516ca743694159cb846a9d
- https://github.com/MythicalLTD/FeatherPanel/releases/tag/v1.3.7.10
- https://www.vulncheck.com/advisories/featherpanel-before-1.3.7.10-privilege-escalation-via-subuser-permission-update
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.