CVE-2025-5402 is a critical SQL Injection vulnerability identified in the chaitak-gorai Blogbook software, specifically affecting the /admin/includes/edit_post.php file within the GET Parameter Handler component. The vulnerability arises from improper sanitization of the 'edit_post_id' GET parameter, allowing an attacker to inject malicious SQL code remotely without requiring authentication or user interaction. This flaw enables an attacker to manipulate backend database queries, potentially leading to unauthorized data access, data modification, or deletion. The product uses continuous delivery with rolling releases, making it difficult to pinpoint exact affected versions or available patches. The vendor has not responded to the disclosure, and no patches or mitigations have been officially released. The CVSS v4.0 score is 6.9 (medium severity), reflecting network exploitability without privileges or user interaction, but with limited confidentiality, integrity, and availability impact. No known exploits are currently reported in the wild, but public disclosure increases the risk of exploitation attempts.

For European organizations using chaitak-gorai Blogbook, this vulnerability poses a significant risk to the confidentiality and integrity of their data. Successful exploitation could lead to unauthorized access to sensitive blog content, user information, or administrative data, potentially resulting in data breaches or defacement. The ability to execute arbitrary SQL commands remotely without authentication increases the threat level, especially for organizations relying on Blogbook for internal or public-facing content management. Given the lack of vendor response and patches, organizations may face prolonged exposure. This could impact sectors such as media, education, and small to medium enterprises that use Blogbook for content management. Additionally, regulatory frameworks like GDPR impose strict data protection requirements, so exploitation leading to data leakage could result in legal and financial penalties.

Organizations should immediately audit their use of Blogbook and identify any instances of the vulnerable component. As no official patches are available, the following specific mitigations are recommended: 1) Implement Web Application Firewall (WAF) rules to detect and block suspicious SQL injection patterns targeting the 'edit_post_id' parameter. 2) Restrict access to the /admin/includes/edit_post.php endpoint via network segmentation or IP whitelisting to limit exposure. 3) Employ input validation and parameterized queries if source code access is possible to remediate the vulnerability internally. 4) Monitor logs for unusual database query patterns or failed injection attempts. 5) Consider migrating to alternative CMS platforms with active security support if remediation is not feasible. 6) Maintain regular backups of database content to enable recovery in case of data corruption or deletion.