CVE-2026-32321 in clipbucket-v5
Summary
by MITRE • 03/18/2026
ClipBucket v5 is an open source video sharing platform. An authenticated time-based blind SQL injection vulnerability exists in ClipBucket prior to 5.5.3 #80 within the `actions/ajax.php` endpoint. Due to insufficient input sanitization of the `userid` parameter, an authenticated attacker can execute arbitrary SQL queries, leading to full database disclosure and potential administrative account takeover. Version 5.5.3 #80 fixes the issue.
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Analysis
by VulDB Data Team • 03/23/2026
The ClipBucket v5 video sharing platform contains a critical authenticated time-based blind sql injection vulnerability identified as CVE-2026-32321 affecting versions prior to 5.5.3 #80. This vulnerability resides within the actions/ajax.php endpoint and specifically targets the userid parameter which lacks proper input sanitization. The flaw represents a classic sql injection vector that allows attackers to manipulate database queries through crafted input. According to the weakness classification under CWE-89, this vulnerability falls under the category of improper neutralization of special elements used in sql commands, making it a direct descendant of the well-known sql injection attack pattern. The vulnerability requires authentication to exploit, meaning an attacker must first obtain valid user credentials to leverage this weakness.
The technical exploitation of this vulnerability occurs through time-based blind sql injection techniques where the attacker can infer database contents by measuring response times from the server. The userid parameter in the ajax.php endpoint does not properly sanitize user input before incorporating it into sql queries, allowing an authenticated attacker to craft malicious payloads that manipulate the underlying database operations. This type of injection attack leverages the database's ability to delay responses when certain conditions are met, enabling the attacker to extract information character by character through iterative requests. The attack follows established patterns documented in the mitre attack framework under techniques related to sql injection and credential access. The vulnerability's impact extends beyond simple data theft as it provides a pathway for complete database disclosure and potential administrative account takeover.
The operational impact of this vulnerability is severe for ClipBucket installations, as it enables authenticated attackers to gain unauthorized access to sensitive user data and system information. Successful exploitation can lead to complete database compromise, allowing attackers to view, modify, or delete user accounts, personal information, and system configurations. The time-based nature of the injection makes detection more challenging for security monitoring systems, as the malicious activity may appear as normal user behavior. Organizations running affected versions face significant risk of data breaches, unauthorized access to user accounts, and potential system compromise. The vulnerability particularly affects systems where user authentication is required for database access, as it allows attackers with valid credentials to escalate their privileges and gain deeper system access. This represents a critical security gap that undermines the platform's integrity and user data protection mechanisms.
The recommended mitigation for this vulnerability involves immediate deployment of the patched version 5.5.3 #80 which addresses the input sanitization issue in the actions/ajax.php endpoint. Organizations should implement proper parameter validation and sanitization for all user inputs, particularly those used in database queries. The fix should include input escaping, parameterized queries, and proper output encoding to prevent sql injection attacks. Security teams should also conduct thorough vulnerability assessments to identify similar issues in other components of the platform. Additional defensive measures include implementing web application firewalls, monitoring for unusual database query patterns, and establishing robust access controls. Regular security updates and patch management processes should be enforced to prevent similar vulnerabilities from arising in the future. The remediation process should also include user account monitoring and credential verification to detect potential unauthorized access attempts that may exploit this vulnerability.