SSA-279823

Siemens Security Advisory by Siemens ProductCERT

SSA-279823: Cross-Site Scripting Vulnerability in SIMATIC S7-1200 CPU V2/V3 Before V3.0.2

Publication Date:	2012-10-08
Last Update:	2025-10-14
Current Version:	V1.2
CVSS v3.1 Base Score:	9.6
CVSS v4.0 Base Score:	8.6

SUMMARY

The web server on SIMATIC S7-1200 CPU V2/V3 Before V3.0.2 contains a cross-site scripting (XSS) vulnerability that could allow remote attackers to inject arbitrary web script or HTML via a crafted URI.

Siemens has released a new version for SIMATIC S7-1200 CPU V3 family (incl. SIPLUS variants) and recommends to update to the latest version. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.

KNOWN AFFECTED PRODUCTS

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Affected Product and Versions	Remediation
SIMATIC S7-1200 CPU V2 family (incl. SIPLUS variants) All versions affected by CVE-2012-3040	Currently no fix is planned See recommendations from section Workarounds and Mitigations
SIMATIC S7-1200 CPU V3 family (incl. SIPLUS variants) All versions < V3.0.2 affected by CVE-2012-3040	Update to V3.0.2 or later version See further recommendations from section Workarounds and Mitigations

WORKAROUNDS AND MITIGATIONS

Siemens has identified the following specific workarounds and mitigations that customers can apply to reduce the risk:

Disable JavaScript within the web browser used to access the web server of the affected products
Utilize a modern web browser with integrated XSS filtering mechanisms
Deactivate the web server if not required. The web server is disabled by default.

Product-specific remediations or mitigations can be found in the section Known Affected Products.
Please follow the General Security Recommendations.

GENERAL SECURITY RECOMMENDATIONS

As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity

PRODUCT DESCRIPTION

SIMATIC S7-1200 CPU products have been designed for discrete and continuous control in industrial environments such as manufacturing, food and beverages, and chemical industries worldwide.

SIPLUS extreme products are designed for reliable operation under extreme conditions and are based on SIMATIC, LOGO!, SITOP, SINAMICS, SIMOTION, SCALANCE or other devices. SIPLUS devices use the same firmware as the product they are based on.

VULNERABILITY DESCRIPTION

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This chapter describes all vulnerabilities (CVE-IDs) addressed in this security advisory. Wherever applicable, it also documents the product-specific impact of the individual vulnerabilities.

Vulnerability CVE-2012-3040

The web server on affected devices contains a cross-site scripting (XSS) vulnerability that could allow remote attackers to inject arbitrary web script or HTML via a crafted URI.

CVSS v3.1 Base Score	9.6
CVSS v3.1 Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS v4.0 Base Score	8.6
CVSS v4.0 Vector	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N
CWE	CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

ACKNOWLEDGMENTS

Siemens thanks the following parties for their efforts:

Artem Zinenko from Kaspersky for pointing out that SIPLUS should also be mentioned
Yury Goltsev, Dmitriy Serebryannikov, Artem Chaikin, and Timur Yunusov from Positive Technologies for coordinated disclosure

ADDITIONAL INFORMATION

For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories

HISTORY DATA

V1.0 (2012-10-08):	Publication Date
V1.1 (2020-02-10):	SIPLUS devices now explicitly mentioned in the list of affected products
V1.2 (2025-10-14):	Used CVE ID (CVE-2012-3040) instead of the deprecated SVE ID (SVE-2012-0004); Corrected CVSS vector of CVE-2012-3040; Updated SSA to current data model and support of csaf

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