CVE-2025-5401 is a critical SQL Injection vulnerability identified in the chaitak-gorai Blogbook software, specifically affecting an unknown functionality within the /post.php file's GET parameter handler. The vulnerability arises from improper sanitization of the 'p_id' parameter, allowing an attacker to inject malicious SQL code remotely without requiring authentication or user interaction. This can lead to unauthorized access, data leakage, data modification, or even full compromise of the underlying database. The product uses a rolling release model, which complicates pinpointing exact affected versions or patches. The vendor has not responded to disclosure attempts, and although no known exploits are currently observed in the wild, the public availability of the exploit code increases the risk of exploitation. The CVSS 4.0 score is 6.9 (medium severity), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and limited impact on confidentiality, integrity, and availability. However, the potential for SQL Injection to escalate impact remains significant depending on the database and application context.

For European organizations using Blogbook, this vulnerability poses a tangible risk of data breaches, unauthorized data manipulation, and potential service disruption. Given the remote and unauthenticated nature of the exploit, attackers could compromise sensitive content, user data, or backend systems. This is particularly concerning for media, publishing, or content management entities relying on Blogbook for their web presence. Data privacy regulations such as GDPR heighten the consequences of data exposure, potentially leading to regulatory fines and reputational damage. Additionally, compromised systems could be leveraged for further attacks within organizational networks. The lack of vendor response and absence of patches exacerbate the risk, as organizations may struggle to remediate promptly.

Organizations should immediately audit their Blogbook installations to identify affected versions, focusing on the presence of the vulnerable /post.php endpoint and the 'p_id' parameter usage. As no official patches are available, temporary mitigations include implementing web application firewall (WAF) rules to detect and block SQL Injection patterns targeting 'p_id'. Input validation and parameterized queries should be enforced if source code access is possible. Network segmentation and strict access controls can limit exposure. Monitoring logs for suspicious queries or anomalies related to /post.php is critical. Organizations should consider migrating to alternative platforms if vendor support remains absent. Regular backups and incident response plans should be updated to prepare for potential exploitation.