CVE-2015-20128
Deferred Deferred - Pending Action

SQL Injection in FooSun DotNetCMS

Publication date: 2026-10-20

Last updated on: 2026-10-23

Assigner: VulnCheck

Description
FooSun DotNetCMS 1.0 and 2.0 contains an SQL injection vulnerability that allows unauthenticated attackers to manipulate MSSQL queries through the CityId parameter. Attackers can send GET requests to /user/City_ajax.aspx with UNION SELECT payloads in CityId, concatenated unsanitized into the sys_City query, to extract database information. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-14.

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Meta Information

Published
2026-10-20
Last Modified
2026-10-23
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2015-20128

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
FooSun DotNetCMS 1.0
FooSun DotNetCMS 2.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.

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Executive Summary

This vulnerability is an SQL injection flaw in FooSun DotNetCMS versions 1.0 and 2.0. It allows unauthenticated attackers to manipulate MSSQL database queries by injecting malicious payloads into the CityId parameter. Attackers can send specially crafted GET requests to /user/City_ajax.aspx with UNION SELECT statements in CityId, which are then concatenated unsanitized into the sys_City query. This enables extraction of sensitive database information.

Detection Guidance

To detect this SQL injection vulnerability, monitor HTTP GET requests to /user/City_ajax.aspx with suspicious CityId parameters containing UNION SELECT payloads. Check web server logs for requests attempting to manipulate MSSQL queries. Use tools like SQLmap to test for SQL injection by sending crafted CityId values.

Impact Analysis

This vulnerability can lead to unauthorized access to sensitive data stored in the database, including user credentials, personal information, or other confidential records. Attackers could extract, modify, or delete data, potentially causing data breaches, service disruption, or further compromise of the system.

Compliance Impact

This vulnerability can severely impact compliance with GDPR and HIPAA by enabling unauthorized access to personal and sensitive health data. GDPR requires protection of personal data, and HIPAA mandates safeguards for protected health information. A successful exploit could result in violations, leading to legal penalties, reputational damage, and loss of trust.

Mitigation Strategies

Immediately update FooSun DotNetCMS to the latest patched version. If no patch is available, restrict access to /user/City_ajax.aspx via web server rules. Sanitize the CityId parameter input to prevent SQL injection. Consider using a web application firewall to block malicious requests.

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