CVE-2026-67243

Unrestricted File Upload Enabling Arbitrary OS Command Execution in Freo2

Published Aug 4, 2026 CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Description
freo2 provided by refirio contains an unrestricted upload of file with dangerous type vulnerability. A user with the highest-level administrative privileges for the product may upload an executable file and execute arbitrary OS commands.

Analysis

AI-generated

Technical impact

A flaw in refirio’s freo2 lets an attacker who holds the highest level of administrative privileges upload a file of any type, including executable binaries. The application then executes the uploaded file’s contents as an operating‑system command, granting the attacker full control over the server.

Affected Systems

The vulnerable product is freo2 from refirio. No specific version is listed, so all current or future releases are potentially affected until a vendor update is applied.

Risk and Exploitability

The CVSS score of 8.6 denotes a high‑severity issue. Because the attack requires local administrative access, the likelihood of an outsider exploiting it is low, but an insider or compromised administrator can abuse the flaw immediately. The EPSS score is not reported and the vulnerability is not in the CISA KEV catalog, indicating no known active exploitation at present.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest security patch for freo2 released by refirio that limits file uploads to safe types and prevents execution of the uploaded files.
  • If a patch is not yet available, disable the upload of executable files in the administrative interface or configure the application to reject files with MIME types associated with executables.
  • Configure the directory used for uploaded files so that the web server process cannot execute files from that location by adjusting file system permissions and disabling the appropriate executable flags.

Generated by OpenCVE AI on August 4, 2026 at 20:06 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Refirio
Refirio freo2
Vendors & Products Refirio
Refirio freo2
Type Values Removed Values Added
Title Unrestricted File Upload Enabling Arbitrary OS Command Execution in Freo2
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description freo2 provided by refirio contains an unrestricted upload of file with dangerous type vulnerability. A user with the highest-level administrative privileges for the product may upload an executable file and execute arbitrary OS commands.
Weaknesses CWE-434
References
Metrics cvssV3_0

{'score': 7.2, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses
  • CWE-434

    Unrestricted Upload of File with Dangerous Type

Sources

Status
PUBLISHED
Assigner
jpcert
Published
Updated
Aug 4, 2026, 1:45 PM
Reserved
Jul 28, 2026, 11:15 PM
Status
Deferred
Published
Aug 4, 2026, 8:16 AM
Modified
Oct 23, 2026, 11:10 PM