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Vulnerability record · CVE-2017-6027 · published 19 May 2017

CVE-2017-6027: Codesys web server unrestricted file upload vulnerability

Codesys · Web Server

An Arbitrary File Upload issue was discovered in 3S-Smart Software Solutions GmbH CODESYS Web Server. The following versions of CODESYS Web Server, part of the CODESYS WebVisu web browser visualization software, are affected: CODESYS Web Server Versions 2.3 and prior. A specially crafted web server request may allow the upload of arbitrary files (with a dangerous type) to the CODESYS Web Server without authorization which may allow remote code execution.

9.8 CVSS 3.0 Critical EPSS 2.6% · top 15.0% CWE-434 · Unrestricted file upload
9.8CVSS 3.0 base score, v2 7.5
2.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

An Arbitrary File Upload issue was discovered in 3S-Smart Software Solutions GmbH CODESYS Web Server. The following versions of CODESYS Web Server, part of the CODESYS WebVisu web browser visualization software, are affected: CODESYS Web Server Versions 2.3 and prior. A specially crafted web server request may allow the upload of arbitrary files (with a dangerous type) to the CODESYS Web Server without authorization which may allow remote code execution.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/97174 Third Party AdvisoryVDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-17-087-02 Third Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/97174 Third Party AdvisoryVDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-17-087-02 Third Party AdvisoryUS Government Resource

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-6027), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.