CVE-2025-48301 in SMTP for SendGrid Plugin
Summary
by MITRE • 07/16/2025
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in YayCommerce SMTP for SendGrid – YaySMTP allows SQL Injection. This issue affects SMTP for SendGrid – YaySMTP: from n/a through 1.5.
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Analysis
by VulDB Data Team • 07/17/2025
The vulnerability identified as CVE-2025-48301 represents a critical SQL injection flaw within the YayCommerce SMTP for SendGrid plugin, specifically affecting versions ranging from the initial release through version 1.5. This vulnerability resides in the plugin's handling of user-supplied input within SQL command construction, creating a pathway for malicious actors to manipulate database queries and potentially gain unauthorized access to sensitive information. The issue stems from inadequate input validation and sanitization mechanisms that fail to properly neutralize special characters and control sequences that could alter the intended execution flow of SQL statements.
The technical exploitation of this vulnerability occurs when the plugin processes user input through parameters that are directly incorporated into SQL queries without proper escaping or parameterization. This allows attackers to inject malicious SQL code that can manipulate the database structure, extract confidential data, modify existing records, or even execute administrative commands on the underlying database system. The flaw specifically manifests in the plugin's SMTP configuration handling where user-entered values such as email addresses, server names, or authentication credentials are improperly sanitized before being used in database operations. According to CWE classification, this vulnerability maps to CWE-89 which describes improper neutralization of special elements used in an SQL command, making it a classic example of SQL injection vulnerability that has been extensively documented in security literature and industry frameworks.
The operational impact of this vulnerability extends beyond simple data theft to encompass potential system compromise and business disruption. Attackers could leverage this weakness to extract customer data, administrative credentials, or other sensitive information stored within the database. The vulnerability's presence in a widely used email delivery plugin means that compromised systems could face unauthorized email sending capabilities, data exfiltration, or even complete database corruption. From an ATT&CK framework perspective, this vulnerability aligns with techniques such as T1071.004 (Application Layer Protocol: DNS) and T1566 (Phishing) as attackers might use the compromised system to send malicious emails, while T1046 (Network Service Scanning) and T1595.001 (Active Scanning) could be employed to identify and exploit the vulnerable plugin installation. The affected version range suggests that the vulnerability has existed for some time, potentially exposing numerous installations to risk.
Mitigation strategies for CVE-2025-48301 must address both immediate remediation and long-term security hardening. The primary recommendation involves upgrading to the latest version of the YayCommerce SMTP for SendGrid plugin where the vulnerability has been patched through proper input sanitization and parameterized query implementation. Organizations should implement comprehensive input validation that filters or escapes special characters before database processing, following established security best practices such as those outlined in OWASP SQL Injection Prevention Cheat Sheet. Database access controls should be reviewed to ensure least privilege principles are applied, limiting the potential impact of successful exploitation. Additionally, network segmentation and monitoring solutions should be deployed to detect anomalous database access patterns that might indicate exploitation attempts. Security teams should conduct thorough penetration testing to verify the effectiveness of implemented controls and monitor for any signs of compromise in systems where the vulnerable plugin remains installed. The vulnerability's classification as a SQL injection flaw necessitates adherence to database security guidelines that emphasize prepared statements, stored procedures, and proper error handling to prevent information disclosure that could aid further exploitation attempts.