【Security Advisory】XSS Vulnerability in Sungrow iSolarCloud(SGSA-202606-0005)

Publish Date: 20261015

Advisory ID: SGSA-202606-0005

Product:  iSolarCloud

CVE ID: /

Severity: Low

Date: 2026-10-15

Description

A DOM‑based cross‑site scripting (XSS) vulnerability exists in Sungrow iSolarCloud. Insufficient validation and encoding are applied to user‑supplied input within one of the website’s message‑sending functions. An attacker can construct malicious scripts in message content. Successful exploitation requires tricking the victim into accessing attacker‑crafted malicious content. When other users visit the page containing this malicious content, the script executes in their browsers.

Affected Versions

Vulnerable: The vulnerability was fully remediated on June 30, 2026; the system before this date carried this security exposure.

Not Affected: Following the remediation deployment on June 30, 2026, the system is no longer vulnerable to this flaw.

Vulnerability Rating

CVSS(4.0): 2.0/Low/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

The scoring is based on the CVSS 4.0 standard. The scoring criteria can be referenced at (https://www.first.org/cvss/calculator/4.0)

Mitigation and Remediation

Recommended Action: The iSolarCloud has been upgraded and repaired as of June 30, 2026, No action is required from customers.

Patch Release: N/A.

Temporary Fix: N/A.

Acknowledgments

This vulnerability was discovered and reported by Marlon Starkloff.

Contact information

For security issues regarding Sungrow products and solutions, please report to Sungrow psirt@sungrowpower.com.

Revision History

Statement

All software updates, patches, and documentation provided by Sungrow Power Supply Co., Ltd. are the proprietary work of Sungrow. These materials may only be used for product maintenance and security improvements. Any unauthorized modification, distribution, decompilation, or reverse engineering is strictly prohibited.

Sungrow makes no express or implied warranties regarding the information provided, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement. Sungrow shall not be liable for any direct, indirect, incidental, or consequential damages arising from the use of this document or associated software.

Sungrow reserves the right to update or modify this document at any time without prior notice. Customers are responsible for implementing security updates in a timely manner to protect their systems.