Overview
This report details the technical aspects of an SQL Injection vulnerability found in YayCommerce’s YaySMTP software. The vulnerability, identified as CVE-2025-48161, could potentially give malicious actors access to sensitive system data or even compromise the system entirely. It is of utmost importance for those utilizing YaySMTP, particularly versions up to and including 1.3, to understand and address this vulnerability.
Vulnerability Summary
CVE ID: CVE-2025-48161
Severity: High (7.6 CVSS Score)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
YaySMTP | up to and including 1.3
How the Exploit Works
The vulnerability arises from the application’s improper neutralization of special elements used in an SQL command. This lack of neutralization allows an attacker to manipulate SQL queries by injecting malicious SQL code. This could potentially lead to unauthorized viewing, modification, or deletion of data in the backend database.
Conceptual Example Code
A conceptual example of the exploit might look like the following HTTP request, where the “malicious_payload” is an SQL command that the vulnerable system executes:
POST /vulnerable/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "user_input": "'; DROP TABLE users; --" }In this example, the malicious SQL command `’; DROP TABLE users; –` is injected into the “user_input” field. The SQL command terminates the current SQL statement (with `’;`), then issues a new command to drop the “users” table (with `DROP TABLE users;`), and finally comments out the rest of the original SQL statement (with `–`).
Mitigation
Users are advised to apply the patch provided by the vendor as soon as possible. In the meantime, or if the patch cannot be applied immediately, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can help mitigate the vulnerability.
