Is CVE-2023-39966 actively exploited?

No active exploitation of CVE-2023-39966 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-39966 be exploited remotely?

Yes. CVE-2023-39966 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-39966?

CVE-2023-39966 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-39966

CWE-862Published: August 10, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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.

NVD Source

Risk Analysis

1Panel contains an arbitrary file write vulnerability due to insufficient parameter filtering in the file save function. This critical flaw allows an attacker to gain direct control of the server, as reflected by the 9.8 CVSS score.

There is no public exploit known for this vulnerability, and it is not in the CISA KEV. The flaw is remotely exploitable with low attack complexity.

Recommended Action

Upgrade to 1Panel version 1.5.0 or later.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-39966 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.