CVE-2018-25202 in SAT CFDI
Summary
by MITRE • 03/26/2026
SAT CFDI 3.3 contains an SQL injection vulnerability that allows attackers to manipulate database queries by injecting SQL code through the 'id' parameter in the signIn endpoint. Attackers can submit POST requests with boolean-based blind, stacked queries, or time-based blind SQL injection payloads to extract sensitive data or compromise the application.
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Analysis
by VulDB Data Team • 03/26/2026
The SAT CFDI 3.3 system contains a critical SQL injection vulnerability identified as CVE-2018-25202 that resides within the signIn endpoint of the application's web interface. This vulnerability specifically affects the handling of the 'id' parameter where user input is directly incorporated into database queries without proper sanitization or parameterization. The flaw represents a classic example of insufficient input validation and inadequate query construction practices that have been documented in CWE-89 as SQL injection vulnerabilities. Attackers can exploit this weakness by submitting malicious POST requests containing specially crafted SQL payloads through the vulnerable parameter.
The technical implementation of this vulnerability allows for multiple exploitation techniques including boolean-based blind SQL injection, time-based blind SQL injection, and stacked queries. These methods enable attackers to extract sensitive information from the underlying database through indirect means without direct data exposure. Boolean-based attacks work by manipulating the application's response based on true or false conditions derived from database queries, while time-based techniques rely on causing deliberate delays in query execution to infer information. Stacked queries allow multiple SQL statements to be executed sequentially, potentially enabling more complex attack vectors such as data manipulation or privilege escalation.
The operational impact of this vulnerability extends beyond simple data extraction to include full database compromise and potential system infiltration. Attackers can leverage this vulnerability to access confidential taxpayer information, financial records, and other sensitive data stored within the SAT CFDI 3.3 database. The vulnerability affects the integrity and confidentiality of the Mexican tax administration's digital invoice system, potentially compromising the security of millions of tax-related transactions. This type of vulnerability directly violates security principles outlined in the OWASP Top Ten 2017 and aligns with ATT&CK technique T1213.002 for Data from Information Repositories, representing a significant risk to both government and private sector organizations relying on the system.
Mitigation strategies for CVE-2018-25202 should include immediate implementation of parameterized queries or prepared statements to prevent SQL injection attacks, comprehensive input validation and sanitization of all user-supplied data, and regular security auditing of web applications. Organizations should implement proper access controls and database permissions to limit the impact of potential exploitation. The vulnerability demonstrates the critical importance of following secure coding practices and adhering to standards such as those defined in the ISO/IEC 27001 information security framework. Additionally, implementing web application firewalls and intrusion detection systems can provide additional layers of protection against exploitation attempts. Regular penetration testing and vulnerability assessments should be conducted to identify similar weaknesses in other application components and maintain ongoing security posture.