VDB-397997 · CVE-2026-84715 · EUVD-2026-69798

MythicalLTD FeatherPanel prior 1.3.7.10 Permission Validation SubuserController.updateSubuser improper authorization

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4	$0-$5k	5.17+

Summaryinfo

A vulnerability was found in MythicalLTD FeatherPanel. It has been classified as critical. The affected element is the function SubuserController.updateSubuser of the component Permission Validation. The manipulation leads to improper authorization. This vulnerability is uniquely identified as CVE-2026-84715. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in MythicalLTD FeatherPanel. It has been rated as critical. This issue affects the function SubuserController.updateSubuser of the component Permission Validation. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. The summary by CVE 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 advisory is shared at github.com. The identification of this vulnerability is CVE-2026-84715 since 09/02/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

Upgrading to version 1.3.7.10 eliminates this vulnerability. Applying the patch 06ef8dcac471201748516ca743694159cb846a9d is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-69798). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

MythicalLTD

Name

FeatherPanel

Website

Product: https://github.com/MythicalLTD/FeatherPanel/

CPE 2.3info

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CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (VulnCheck): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authorization
CWE: CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FeatherPanel 1.3.7.10
Patch: 06ef8dcac471201748516ca743694159cb846a9d

Timelineinfo

09/02/2026 Advisory disclosed
09/02/2026 +0 days CVE reserved
09/02/2026 +0 days VulDB entry created
09/02/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-84715 (🔒)
GCVE (CVE): GCVE-0-2026-84715
GCVE (VulDB): GCVE-100-397997
EUVD: 🔒

Entryinfo

Created: 09/02/2026 03:40
Updated: 09/02/2026 05:06
Changes: 09/02/2026 03:40 (77), 09/02/2026 05:06 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.