CVE-2026-103668 in Movable Type
Summary
by MITRE • 10/07/2026
An SQL Injection vulnerability exists in the Site Search function of Movable Type, which may allow an unauthenticated attacker to execute an arbitrary SQL query on the affected product.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 10/07/2026
The identified security flaw resides within the site search functionality of the Movable Type content management system, presenting a critical risk due to its potential for remote exploitation by unauthenticated actors. This vulnerability is classified as an SQL Injection, specifically falling under CWE-89 in the Common Weakness Enumeration taxonomy, which denotes improper neutralization of special elements used in an SQL command. The root cause typically stems from insufficient input validation or sanitization mechanisms when processing user-supplied data within search query parameters. Instead of treating these inputs strictly as literal strings, the application inadvertently interprets them as part of the executable SQL syntax, allowing maliciously crafted payloads to alter the intended logic of database queries.
From an operational perspective, this vulnerability enables a wide range of adverse outcomes depending on the configuration and privileges associated with the database account used by the web application. An attacker can leverage this flaw to extract sensitive data from the backend database, including user credentials, personal identifiable information, or proprietary content stored within the system. Furthermore, if the underlying database management system permits it, such as Microsoft SQL Server or MySQL with specific configurations, an attacker might escalate privileges to execute operating system commands, effectively achieving remote code execution on the server hosting the application. This transforms a simple data exposure risk into a complete compromise of the host infrastructure, leading to potential service disruption, data integrity violations, and significant reputational damage for organizations relying on Movable Type for their web presence.
The attack vector is particularly concerning because it requires no authentication, meaning any internet user can attempt exploitation without needing valid credentials or prior access privileges. This significantly lowers the barrier to entry for attackers, facilitating automated scanning campaigns that target vulnerable instances across the global infrastructure. The impact extends beyond immediate data theft; successful exploitation may allow an attacker to modify or delete records within the database, leading to defacement of the website or loss of critical business information. In severe cases, persistent backdoors can be installed through techniques such as writing files directly via SQL commands if file write permissions are granted to the database user, ensuring long-term unauthorized access even after initial detection and remediation efforts.
To mitigate this vulnerability, immediate action is required to patch the affected version of Movable Type or apply vendor-provided security updates that address the input handling logic in the search module. Developers should ensure that all dynamic SQL queries are constructed using parameterized statements or prepared statements rather than string concatenation, which inherently prevents injection by separating code from data at the database engine level. Additionally implementing strict input validation policies that whitelist expected characters for search fields can provide an additional layer of defense against unexpected payloads. It is also advisable to enforce the principle of least privilege for the application's database account, restricting permissions so that even if an injection occurs, the attacker cannot perform destructive operations such as dropping tables or executing system-level commands. Regular security audits and penetration testing should be conducted to identify similar weaknesses in other parts of the application before they can be exploited by malicious actors leveraging tools aligned with MITRE ATT&CK techniques for SQL Injection attacks.