CVE-2026-84715CWE-862broken-access-control

CVE-2026-84715

High · published September 2, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
46.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00564 · 46.2th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-09-02T06:17Z
References (6)
https://github.com/MythicalLTD/FeatherPanel · [email protected]https://github.com/MythicalLTD/FeatherPanel/blob/376b003aa9685b74153d239d2b3f64a752cdc0f0/backend/app/Controllers/User/Server/SubuserController.php#L454 · [email protected]https://github.com/MythicalLTD/FeatherPanel/blob/376b003aa9685b74153d239d2b3f64a752cdc0f0/backend/app/Helpers/ServerGateway.php · [email protected]https://github.com/MythicalLTD/FeatherPanel/commit/06ef8dcac471201748516ca743694159cb846a9d · [email protected]https://github.com/MythicalLTD/FeatherPanel/releases/tag/v1.3.7.10 · [email protected]https://www.vulncheck.com/advisories/featherpanel-before-1.3.7.10-privilege-escalation-via-subuser-permission-update · [email protected]
EPSS history
Timeline
  • 03 SEP 03:32Z
    EPSS moved — → 0%
    epss
  • 02 SEP 01:18Z
    FeatherPanel before 1.3.7.10 Privilege Escalation via Subuser Permission Update
    cvelistv5