CVE-2026-33352 in AVideo
Summary
by MITRE • 03/23/2026
WWBN AVideo is an open source video platform. Prior to version 26.0, an unauthenticated SQL injection vulnerability exists in `objects/category.php` in the `getAllCategories()` method. The `doNotShowCats` request parameter is sanitized only by stripping single-quote characters (`str_replace("'", '', ...)`), but this is trivially bypassed using a backslash escape technique to shift SQL string boundaries. The parameter is not covered by any of the application's global input filters in `objects/security.php`. Version 26.0 contains a patch for the issue.
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Analysis
by VulDB Data Team • 03/23/2026
The vulnerability CVE-2026-33352 represents a critical SQL injection flaw in the WWBN AVideo platform that affects versions prior to 26.0. This vulnerability resides within the `objects/category.php` file in the `getAllCategories()` method, where the application fails to properly sanitize user input before incorporating it into database queries. The flaw specifically targets the `doNotShowCats` request parameter which is processed through a simplistic sanitization routine that merely removes single quote characters using `str_replace("'", '', ...)`. This approach demonstrates a fundamental misunderstanding of input validation principles and represents a classic example of inadequate data sanitization that violates established security practices.
The technical exploitation of this vulnerability occurs through a straightforward backslash escape technique that circumvents the trivial sanitization method. When an attacker supplies a malicious payload containing a backslash followed by a single quote character, the sanitization process removes only the single quote while leaving the backslash intact, effectively breaking the SQL string boundary and allowing arbitrary SQL commands to be executed within the database context. This bypass technique is well-documented in cybersecurity literature and represents one of the most common methods for circumventing weak input validation mechanisms. The vulnerability is particularly dangerous because it requires no authentication credentials to exploit, making it accessible to any remote attacker with knowledge of the application's API endpoints.
The operational impact of this vulnerability extends beyond simple data theft or modification, as it provides attackers with complete database access and control. An attacker could potentially extract all user credentials, personal information, and system configuration details stored in the database. The lack of global input filtering in `objects/security.php` indicates a broader architectural weakness in the application's security posture, where individual components fail to implement proper input validation mechanisms that should be enforced across the entire application framework. This vulnerability directly relates to CWE-89 which defines SQL injection as a weakness that occurs when an application does not properly sanitize user input before using it in database queries, and aligns with ATT&CK technique T1190 which describes exploiting vulnerabilities in web applications to gain unauthorized access to systems.
The remediation for this vulnerability in version 26.0 demonstrates proper security engineering practices through comprehensive input validation and parameterized query implementation. The patch addresses the root cause by implementing robust sanitization mechanisms that properly handle escape sequences and implement proper input filtering at the application level. Organizations should implement immediate patching of affected systems and conduct thorough security assessments to identify any potential exploitation attempts. The vulnerability also highlights the importance of following secure coding practices such as using prepared statements and parameterized queries, which would have prevented this issue entirely. Additionally, implementing proper input validation at multiple layers of the application architecture would provide defense in depth against similar vulnerabilities. The incident underscores the necessity of comprehensive security testing including penetration testing and code review processes to identify and remediate such critical flaws before they can be exploited in production environments.