CVE-2025-57263 in Guestbook
Summary
by MITRE • 09/04/2025
An authenticated SQL injection vulnerability in VX Guestbook 1.07 allows attackers with admin access to inject malicious SQL payloads via the "word" POST parameter in the words.php admin panel.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 09/04/2025
The vulnerability CVE-2025-57263 represents a critical authenticated SQL injection flaw within VX Guestbook version 1.07, specifically targeting the administrative interface. This vulnerability resides in the words.php file where the application fails to properly sanitize user input submitted through the "word" POST parameter. The flaw exists because the application directly incorporates unsanitized input into SQL query constructions without adequate validation or parameterization mechanisms, creating an exploitable pathway for malicious actors who have already gained administrative credentials.
The technical implementation of this vulnerability stems from poor input validation practices and inadequate database query construction methods within the VX Guestbook application. When an authenticated administrator submits data through the words.php interface, the application processes the "word" parameter directly within SQL statements without employing prepared statements or proper input sanitization techniques. This design flaw aligns with CWE-89 which specifically addresses SQL injection vulnerabilities, and the weakness manifests as a direct consequence of insufficient data validation and improper query construction. The vulnerability operates under the assumption that the attacker already possesses administrative privileges, which significantly reduces the attack surface complexity but does not eliminate the critical risk posed by the injection capability.
From an operational impact perspective, this vulnerability enables a compromised administrator to execute arbitrary SQL commands against the underlying database system, potentially leading to complete data exfiltration, unauthorized data modification, or even database compromise. The attacker could leverage this vulnerability to extract sensitive information including user credentials, guestbook entries, system configurations, and potentially escalate privileges within the database environment. The attack vector is particularly concerning because it operates within the trusted administrative context, meaning that any successful exploitation would bypass typical user-level security controls and could result in widespread data compromise within the application's data store.
The mitigation strategies for CVE-2025-57263 should focus on immediate implementation of proper input sanitization and parameterized queries within the VX Guestbook application. Organizations should ensure that all user-supplied input, particularly within administrative interfaces, undergoes rigorous validation and sanitization before being incorporated into database operations. The recommended approach involves implementing prepared statements or parameterized queries to separate SQL command structure from data values, thereby preventing malicious SQL code injection. Additionally, regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other application components, while access controls and privilege management should be strictly enforced to minimize the impact of potential compromise. This vulnerability demonstrates the critical importance of following secure coding practices and adheres to ATT&CK technique T1078 which addresses valid accounts and privilege escalation through exploitation of administrative interfaces.