FeatherPanel before 1.3.7.10 Privilege Escalation via Subuser Permission Update
Priority MEDIUM 40CWE-862Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00564 47th percentileScored 2026-11-07
Fix Fixed FeatherPanel (MythicalLTD): 1.3.7.10
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| MythicalLTD | FeatherPanel | before 1.3.7.10 | 1.3.7.10 | Patch available | CNA |
- FeatherPanel VendorMythicalLTD Affected before 1.3.7.10 Fixed in 1.3.7.10 Patch available CNA
Remediation
- Fix · CNA FeatherPanel (MythicalLTD) Fixed in 1.3.7.10
Timeline
- 2026-10-02 Threatist record created from CVE-2026-84715
- 2026-10-03 Alias added: GHSA-2cvx-7j4v-8m5g
References
Patch 1
Other 4
- FeatherPanel v1.3.7.10 Release Notes
- 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
More MythicalLTD vulnerabilities
- TI-2026-39441 MythicalDash: Unauthenticated payment bypass in Stripe success-redirect endpoint allows arbitrary free credit top-up CVSS 4.0HIGH 7.1
Sources
- CVE-2026-84715 · CVE Program
- CVE-2026-84715 · NVD
- FIRST EPSS
- GHSA-2cvx-7j4v-8m5g · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences