CVE-2025-47587 is a high-severity SQL Injection vulnerability (CWE-89) found in the YayCommerce YaySMTP product, affecting versions up to 2.6.4. The vulnerability arises from improper neutralization of special elements in SQL commands, allowing an attacker to perform Blind SQL Injection attacks. Blind SQL Injection is a technique where the attacker can infer information from the database by sending crafted queries and observing application behavior or response times, even though the application does not directly return database error messages or query results. This vulnerability requires network access (AV:N) and low attack complexity (AC:L), but does require high privileges (PR:H) on the system to exploit, and no user interaction (UI:N) is needed. The scope is changed (S:C), meaning the vulnerability can affect resources beyond the initially vulnerable component. The impact on confidentiality is high (C:H), allowing attackers to extract sensitive data from the backend database, but integrity impact is none (I:N), and availability impact is low (A:L). No known exploits are currently in the wild, and no patches have been linked yet. The vulnerability was published on May 7, 2025, and has been enriched by CISA, indicating recognition by US cybersecurity authorities. YaySMTP is a component of YayCommerce, likely used for SMTP-related functionalities such as email sending or processing within e-commerce platforms. An attacker exploiting this vulnerability could extract sensitive data from the database, potentially including user credentials, transaction data, or configuration details, which could lead to further compromise or data breaches.

For European organizations using YaySMTP, this vulnerability poses a significant risk to the confidentiality of sensitive data stored in backend databases. Given the high confidentiality impact, attackers could exfiltrate personal data protected under GDPR, leading to regulatory penalties and reputational damage. The requirement for high privileges to exploit suggests that attackers would need to have already compromised or have insider access to the system, but once exploited, the vulnerability could allow lateral movement or data theft without detection. The low availability impact means service disruption is unlikely, but stealthy data exfiltration could persist undetected. E-commerce platforms are prime targets for cybercriminals due to the financial and personal data they process, making this vulnerability particularly concerning. Additionally, the lack of available patches increases the window of exposure. Organizations may face compliance risks, customer trust erosion, and potential financial losses if this vulnerability is exploited.

1. Immediate mitigation should include restricting access to the YaySMTP service to trusted and authenticated users only, minimizing the risk of privilege escalation leading to exploitation. 2. Implement strict network segmentation and firewall rules to limit exposure of the vulnerable component to internal networks only. 3. Conduct thorough privilege audits to ensure no unnecessary high privileges are granted to users or processes interacting with YaySMTP. 4. Employ Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection patterns targeting YaySMTP endpoints. 5. Monitor logs and network traffic for unusual query patterns or timing anomalies indicative of blind SQL injection attempts. 6. Engage with YayCommerce for timely patches or updates; if unavailable, consider temporary removal or replacement of the vulnerable component. 7. Apply principle of least privilege to database accounts used by YaySMTP, limiting their ability to perform unauthorized queries. 8. Perform regular security assessments and penetration testing focused on SQL injection vectors within the application environment. 9. Educate internal teams about the risk and signs of SQL injection exploitation to enhance detection and response capabilities.