CVE-2026-102570 in ClipBucket
Summary
by MITRE • 09/29/2026
ClipBucket v5 through 5.5.3-#197 contains a time-based blind SQL injection vulnerability in the language update function where the language_id parameter is concatenated unescaped into the WHERE clause of an UPDATE statement. An authenticated administrator with basic_settings permission can inject arbitrary SQL payloads to extract or modify database contents.
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Analysis
by VulDB Data Team • 09/29/2026
The identified vulnerability represents a critical security flaw within ClipBucket versions 5 through 5.5.3-#197, specifically located in the language update functionality of the application. This issue is classified as a time-based blind SQL injection, which falls under the Common Weakness Enumeration category CWE-89 for Improper Neutralization of Special Elements used in an SQL Command. The root cause lies in the failure to properly sanitize or parameterize the language_id input parameter before it is incorporated into database queries. Instead of using prepared statements with bound parameters, the application directly concatenates this user-supplied value into the WHERE clause of an UPDATE statement. This architectural oversight allows an attacker who has gained access to a valid administrative session to manipulate the underlying SQL logic by injecting malicious syntax that alters query execution behavior based on timing delays rather than direct error messages or result sets.
The operational impact of this vulnerability is severe due to the authentication requirement and specific permission level needed for exploitation. An authenticated administrator possessing basic_settings permissions can leverage this flaw to extract sensitive data from the database, modify existing records, or potentially execute arbitrary commands depending on the underlying Database Management System configuration. Because it is a time-based blind injection, the attacker must craft payloads that cause measurable delays in query execution when conditions are met, allowing them to infer information bit by bit. This technique bypasses many standard input validation filters and error-handling mechanisms that might otherwise prevent simpler injection attempts. The ability to read or alter database contents compromises the integrity of user data, potentially leading to account takeovers if credential hashes are extracted, or complete system compromise if the database engine allows for operating system command execution through features like xp_cmdshell in Microsoft SQL Server or similar capabilities in other DBMS platforms.
From a threat intelligence perspective, this vulnerability aligns with MITRE ATT&CK technique T1059.004, which covers Command and Scripting Interpreter: SQL Commands, as well as the broader category of Data Injection attacks. The exploitation path typically involves intercepting administrative traffic via tools like Burp Suite or OWASP ZAP to modify the language_id parameter with crafted SQL strings containing conditional logic such as IF statements combined with sleep functions. Successful exploitation can lead to unauthorized data access corresponding to CWE-862, which denotes Missing Authorization for critical operations involving sensitive information modification. The persistence of this flaw across multiple minor versions indicates a systemic issue in how input validation is implemented within the application's core modules rather than an isolated coding error.
Mitigation strategies must address both immediate remediation and long-term defensive posture improvements. The primary solution requires developers to refactor the affected code path to utilize parameterized queries or prepared statements, ensuring that all user-supplied inputs are treated strictly as data values rather than executable SQL components. Input validation should also be implemented at multiple layers, including client-side checks for usability and server-side strict type checking to ensure language_id is an integer within expected bounds before any database interaction occurs. For organizations unable to immediately patch the software, deploying a Web Application Firewall with rules capable of detecting time-based blind injection patterns can provide temporary protection by blocking requests containing suspicious SQL syntax or unusual response latency profiles associated with such attacks. Additionally, enforcing least-privilege principles for administrative accounts and monitoring logs for anomalous database query durations can aid in early detection of exploitation attempts while the vulnerability is being remediated.