CVE-2026-34101 in language-system
Summary
by MITRE • 07/01/2026
Guardian language-system passes the id GET parameter directly into an unsanitized SQL query in text_file.php (line 17): SELECT id, filename, extension, type, duration, owner, private FROM files where id = '\".$_GET['id'].\"'. An authenticated attacker can perform error-based SQL injection to extract database contents.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 07/06/2026
This vulnerability represents a critical sql injection flaw in the guardian language-system's text_file.php component where user input from the id GET parameter is directly concatenated into an unsanitized sql query without proper validation or escaping mechanisms. The specific implementation at line 17 constructs the sql statement by simply interpolating the $_GET['id'] value directly into the query string, creating an environment where malicious actors can manipulate database access through crafted url parameters. This error-based sql injection vulnerability allows authenticated attackers to extract sensitive database contents by manipulating the id parameter to inject malicious sql payloads that can reveal table structures, user credentials, and other confidential information stored within the database system.
The technical exploitation of this vulnerability follows standard error-based sql injection patterns where an attacker crafts a malicious id parameter that triggers database errors containing extracted data. Since the application is already vulnerable to authenticated sql injection, an attacker must first establish valid authentication credentials to exploit this weakness, which significantly reduces the attack surface compared to unauthenticated vulnerabilities but still presents a severe risk to system integrity and data confidentiality. The vulnerability directly maps to cwe-89 sql injection in the common weakness enumeration catalog and aligns with tactics used in the mitre att&ck framework under the credential access and persistence phases where attackers seek to extract sensitive information from database systems.
The operational impact of this vulnerability extends beyond simple data theft as it enables attackers to potentially escalate privileges within the application, modify existing records, or even delete critical files from the system. Database administrators should immediately investigate whether the attacker could gain access to user accounts, file permissions, or other sensitive system information stored in the database. The injection point specifically targets a files table containing metadata about various file types including owner information and private status flags, making this vulnerability particularly dangerous for systems handling sensitive documents or media files. Organizations should implement immediate mitigations including input validation, parameterized queries, and comprehensive monitoring of sql query patterns to detect potential exploitation attempts.
Recommended mitigation strategies include implementing proper input sanitization and parameterized sql queries to prevent direct concatenation of user input into database statements. The text_file.php script should be updated to use prepared statements with bound parameters instead of string interpolation for all database operations. Additionally, the application should implement robust authentication controls and input validation to ensure that only authorized users can access file operations and that all incoming parameters are properly validated before processing. Security monitoring should be enhanced to detect unusual sql query patterns or attempts to extract database information through error-based injection techniques. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities across the application codebase, particularly in areas where user input is processed without proper sanitization.