Unsanitized user input in LDAP request


Using unsanitized user input in an LDAP request can lead to LDAP injection, which is when attackers can modify the LDAP tree structure by injecting malicious input. It's crucial to ensure that data passed to an LDAP query is either not controlled by the user or is properly sanitized.


  • Do sanitize user input before including it in LDAP queries to prevent LDAP injection attacks.
    public class Cls extends HttpServlet

    public void handleRequest(HttpServletRequest request, HttpServletResponse response)
    String userID = request.getParameter("userID");
    String sanitizedUserID = sanitize(userID); // Ensure sanitization method effectively neutralizes LDAP injection vectors

    String filter = "(&(objectclass=person))(|(uid=" + sanitizedUserID + ")(street={0}))";
    String base = "ou=users,ou=system";
    Object[] filters = new Object[] {"First avenue"};
    javax.naming.directory.SearchControls sc = new javax.naming.directory.SearchControls();

    dirContext.search(base, filter, filters, sc);


Associated CWE

OWASP Top 10


To skip this rule during a scan, use the following flag

bearer scan /path/to/your-project/ --skip-rule=java_lang_ldap_injection

To run only this rule during a scan, use the following flag

bearer scan /path/to/your-project/ --only-rule=java_lang_ldap_injection