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Vulnerabilities

Vulnerability · CVE-2023-39964

fit2cloud 1panel Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Published Apr 6, 2026 · catalog updated Apr 6, 2026 · fit2cloud 1panel Improper Limitation

Patch now

CVE-2023-39964 is in the CISA known-exploited catalog. Confirm fit2cloud 1panel Improper Limitation against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (fit2cloud 1panel Improper Limitation).
  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
0.97%
Remediation
Remediation guidance
Affected products
vendor fit2cloud 1panel

1Panel is an open source Linux server operation and maintenance management panel. In version 1.4.3, arbitrary file reads allow an attacker to read arbitrary important configuration files on the server. In the file, there is a function called , which directly reads the file by obtaining the requested path . The request parameters are not filtered, resulting in a background arbitrary file reading vulnerability. Version 1.5.0 has a patch for this issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor fit2cloud 1panelversion unspecified

How to fix CVE-2023-39964

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2023-39964 is in the CISA known-exploited catalog. Confirm fit2cloud 1panel Improper Limitation against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 0.97%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 6, 2026 · VulnCheck KEV

    Detected

    1Panel is an open source Linux server operation and maintenance management panel. In version 1.4.3, arbitrary file reads allow an attacker to read arbitrary important configuration files on the server. In the file, there is a function called , which directly reads the file by obtaining the requested path . The request parameters are not filtered, resulting in a background arbitrary file reading vu

  2. Apr 6, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2023-39964

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-39964

    30-day exploitation probability 1.0%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2023-39964

    1Panel is an open source Linux server operation and maintenance management panel. In version 1.4.3, arbitrary file reads allow an attacker to read arbitrary important configuration files on the server. In the file, there is a function called , which directly reads the file by obt

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.