CVE-2019-25347 in thesystem
Summary
by MITRE • 02/12/2026
thesystem App 1.0 contains a SQL injection vulnerability that allows attackers to bypass authentication by manipulating the username parameter. Attackers can inject malicious SQL code like ' or '1=1 to the username field to gain unauthorized access to user accounts.
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Analysis
by VulDB Data Team • 03/03/2026
The vulnerability identified as CVE-2019-25347 affects thesystem App version 1.0 and represents a critical SQL injection flaw that directly undermines the application's authentication mechanisms. This vulnerability resides in the username parameter handling within the authentication process, where input validation is insufficient to prevent malicious SQL code execution. The flaw enables attackers to manipulate the application's database queries through crafted input, specifically targeting the username field to bypass legitimate authentication checks. The vulnerability's exploitation is straightforward and well-documented, as demonstrated by the use of the classic SQL injection payload ' or '1=1 which exploits the logical evaluation of database queries.
The technical implementation of this vulnerability stems from improper input sanitization and parameter handling within the application's backend database interactions. When users attempt to authenticate, their input is directly incorporated into SQL queries without adequate escaping or parameterization, creating an exploitable condition that allows attackers to manipulate the intended query execution flow. This vulnerability maps directly to CWE-89, which specifically addresses SQL injection flaws in software applications. The attack vector is particularly dangerous because it operates at the authentication layer, potentially enabling attackers to access any user account within the system's database without proper credentials.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it creates a persistent backdoor for attackers to compromise user accounts and potentially escalate privileges within the system. Successful exploitation allows attackers to bypass all authentication controls and gain full access to user data, potentially leading to data breaches, account takeovers, and further lateral movement within the network. The vulnerability's severity is amplified by its ease of exploitation, as attackers do not require advanced technical skills to leverage the flaw effectively. From an adversarial perspective, this vulnerability aligns with ATT&CK technique T1190, which covers exploitation of remote services, and T1078, which addresses valid accounts usage, as attackers can leverage compromised accounts to maintain persistent access.
Mitigation strategies for CVE-2019-25347 must address the root cause through comprehensive input validation and parameterized query implementation. Organizations should immediately implement proper input sanitization techniques, including the use of prepared statements and parameterized queries to prevent malicious SQL code from being executed. The application should employ strict input validation that rejects or sanitizes potentially dangerous characters and sequences commonly used in SQL injection attacks. Additionally, implementing proper authentication controls with rate limiting and account lockout mechanisms can help prevent automated exploitation attempts. Regular security testing including dynamic and static application security testing should be conducted to identify and remediate similar vulnerabilities. The fix should involve comprehensive code review and reimplementation of all database query operations to ensure that user input is properly escaped or parameterized before being incorporated into SQL statements, thereby preventing the exploitation vector that enables authentication bypass through SQL injection attacks.