CVE-2023-39966
1Panel arbitrary file write vulnerability exists in the background
1Panel is an open source Linux server operation and maintenance management panel. In version 1.4.3, an arbitrary file write vulnerability could lead to direct control of the server. In the api/v1/file.go file, there is a function called SaveContentthat,It recieves JSON data sent by users in the form of a POST request. And the lack of parameter filtering allows for arbitrary file write operations. Version 1.5.0 contains a patch for this issue.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
1Panel arbitrary file write vulnerability exists in the background
1Panel is an open source Linux server operation and maintenance management panel. In version 1.4.3, an arbitrary file write vulnerability could lead to direct control of the server. In the api/v1/file.go file, there is a function called SaveContentthat,It recieves JSON data sent by users in the form of a POST request. And the lack of parameter filtering allows for arbitrary file write operations. Version 1.5.0 contains a patch for this issue.
- Record
CVE-2023-39966- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-862
- Updated
- 2026-11-02
EUVDEUVD-2023-2301
1Panel is an open source Linux server operation and maintenance management panel. In version 1.4.3, an arbitrary file write vulnerability could lead to direct control of the server. In the api/v1/file.go file, there is a function called SaveContentthat,It recieves JSON data sent by users in the form of a POST request. And the lack of parameter filtering allows for arbitrary file write operations. Version 1.5.0 contains a patch for this issue.
- Record
EUVD-2023-2301- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hf7j-xj3w-87g4
1Panel arbitrary file write vulnerability
Summary
An arbitrary file write vulnerability could lead to direct control of the server
Details
Arbitrary file creation
In the api/v1/file.go file, there is a function called SaveContentthat,It recieves JSON data sent by users in the form of a POST request. And the lack of parameter filtering allows for arbitrary file write operations.It looks like this:
- Vulnerable Code
PoC
- We can write the SSH public key into the /etc/.root/authorized_keys configuration file on the server.
-
The server was successfully written to the public key
-
Successfully connected to the target server using an SSH private key.
As a result, the server is directly controlled, causing serious harm
Impact
1Panel v1.4.3
- Record
GHSA-hf7j-xj3w-87g4- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-862
- Updated
- 2026-11-02
NVD
1Panel is an open source Linux server operation and maintenance management panel. In version 1.4.3, an arbitrary file write vulnerability could lead to direct control of the server. In the api/v1/file.go file, there is a function called SaveContentthat,It recieves JSON data sent by users in the form of a POST request. And the lack of parameter filtering allows for arbitrary file write operations. Version 1.5.0 contains a patch for this issue.
- Record
CVE-2023-39966- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-862
- Updated
- 2026-11-02
OSV
1Panel arbitrary file write vulnerability exists in the background
1Panel is an open source Linux server operation and maintenance management panel. In version 1.4.3, an arbitrary file write vulnerability could lead to direct control of the server. In the api/v1/file.go file, there is a function called SaveContentthat,It recieves JSON data sent by users in the form of a POST request. And the lack of parameter filtering allows for arbitrary file write operations. Version 1.5.0 contains a patch for this issue.
- Record
CVE-2023-39966- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-862
- Updated
- 2026-11-02
OSVGHSA-hf7j-xj3w-87g4
1Panel arbitrary file write vulnerability
Summary
An arbitrary file write vulnerability could lead to direct control of the server
Details
Arbitrary file creation
In the api/v1/file.go file, there is a function called SaveContentthat,It recieves JSON data sent by users in the form of a POST request. And the lack of parameter filtering allows for arbitrary file write operations.It looks like this:
- Vulnerable Code
PoC
- We can write the SSH public key into the /etc/.root/authorized_keys configuration file on the server.
-
The server was successfully written to the public key
-
Successfully connected to the target server using an SSH private key.
As a result, the server is directly controlled, causing serious harm
Impact
1Panel v1.4.3
- Record
GHSA-hf7j-xj3w-87g4- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-862
- Updated
- 2026-11-02
OSVGO-2023-2006 No score
1Panel arbitrary file write vulnerability in github.com/1Panel-dev/1Panel
1Panel arbitrary file write vulnerability in github.com/1Panel-dev/1Panel
- Record
GO-2023-2006- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/1Panel-dev/1PanelGo |
1.4.3 to 1.4.3 | 1.5.0 |
github.com/1Panel-dev/1PanelGo |
1.4.3 up to 1.5.0 | 1.5.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-39966 is a high vulnerability (CVSS 7.5) in 1panel-dev 1panel, published August 10, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.83%, the 57th percentile. Fixed in github.com/1Panel-dev/1Panel 1.5.0.
References
github.com/1Panel-dev/1Panel/security/advisories/GHSA-hf7j-xj3w-87g4
nvd.nist.gov/vuln/detail/CVE-2023-39966