CVE-2023-39966: 1Panel arbitrary file write vulnerability exists in the background

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-08-10 · updated 2026-06-17
Weakness: CWE-862

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.

Affected products

1Panel-dev 1Panel: 1.4.3

References

https://github.com/1Panel-dev/1Panel/releases/tag/v1.5.0
https://github.com/1Panel-dev/1Panel/security/advisories/GHSA-hf7j-xj3w-87g4
https://github.com/1Panel-dev/1Panel/releases/tag/v1.5.0
https://github.com/1Panel-dev/1Panel/security/advisories/GHSA-hf7j-xj3w-87g4

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