CVE-2025-5403 is a medium-severity SQL Injection vulnerability identified in the chaitak-gorai Blogbook product, specifically affecting the /admin/view_all_posts.php file within the GET parameter handler component. The vulnerability arises from improper sanitization or validation of the 'post_id' parameter, allowing an attacker to inject malicious SQL code remotely without requiring user interaction or authentication. This can lead to unauthorized access or manipulation of the backend database, potentially exposing sensitive information or altering data integrity. The vulnerability has been publicly disclosed, but no official patch or versioning information is available due to the product's lack of version control and the vendor's non-responsiveness. The CVSS 4.0 base score is 5.3, reflecting a medium severity level, with an attack vector of network (remote), low attack complexity, no privileges required, and no user interaction needed. The impact on confidentiality, integrity, and availability is low to limited, suggesting that while exploitation is feasible, the scope of damage may be contained. No known exploits are currently reported in the wild, but the public disclosure increases the risk of exploitation attempts.

For European organizations using the chaitak-gorai Blogbook platform, this vulnerability poses a risk of unauthorized database access or manipulation, which could lead to data breaches, defacement of blog content, or disruption of administrative functions. Given the administrative context of the affected endpoint, attackers could potentially extract sensitive post data or modify content, impacting the integrity and confidentiality of organizational information. Although the severity is medium, the lack of vendor response and patch availability increases exposure duration. Organizations in sectors with strict data protection regulations, such as GDPR, may face compliance risks if sensitive personal data is compromised. The remote exploitability without authentication heightens the threat, especially for organizations with exposed administrative interfaces. However, the limited impact on availability reduces the likelihood of widespread service disruption.

European organizations should immediately audit their use of the chaitak-gorai Blogbook platform and restrict access to the /admin/view_all_posts.php endpoint through network-level controls such as IP whitelisting or VPN access. Implementing Web Application Firewalls (WAF) with SQL Injection detection and prevention rules can help block malicious payloads targeting the 'post_id' parameter. Since no official patch exists, organizations should consider applying manual input validation and parameterized queries if they have access to the source code or switch to alternative blogging platforms with active security support. Regularly monitoring logs for suspicious query patterns and anomalous database activity is critical. Additionally, organizations should isolate the Blogbook administrative interface from public networks where possible and enforce strong authentication and authorization policies to minimize exposure.