CVE-2026-33293 in AVideo
Summary
by MITRE • 03/22/2026
WWBN AVideo is an open source video platform. Prior to version 26.0, the `deleteDump` parameter in `plugin/CloneSite/cloneServer.json.php` is passed directly to `unlink()` without any path sanitization. An attacker with valid clone credentials can use path traversal sequences (e.g., `../../`) to delete arbitrary files on the server, including critical application files such as `configuration.php`, causing complete denial of service or enabling further attacks by removing security-critical files. Version 26.0 fixes the issue.
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Analysis
by VulDB Data Team • 03/27/2026
The vulnerability identified as CVE-2026-33293 affects the WWBN AVideo platform, a widely used open source video management system that serves as a foundation for video hosting and streaming services. This security flaw resides within the clone server functionality that allows administrators to replicate video platforms across different servers. The issue represents a critical path traversal vulnerability that fundamentally undermines the platform's file system security model and creates significant operational risks for organizations relying on this software.
The technical implementation of this vulnerability stems from improper input validation within the `plugin/CloneSite/cloneServer.json.php` file where the `deleteDump` parameter is directly passed to the PHP `unlink()` function without any sanitization or path validation. This design flaw creates a classic path traversal attack vector that enables malicious actors to manipulate file system operations through carefully crafted input sequences. The vulnerability specifically allows attackers to navigate beyond the intended directory boundaries using standard traversal sequences such as `../../` which can be appended to the `deleteDump` parameter to target files outside the restricted access paths.
The operational impact of this vulnerability extends beyond simple file deletion capabilities and creates a comprehensive attack surface that can lead to complete system compromise. An authenticated attacker with valid clone credentials can exploit this vulnerability to remove critical application files including `configuration.php` which contains essential system configuration data and potentially database connection parameters. The removal of such files would result in immediate denial of service conditions, rendering the entire video platform inoperable. Additionally, the vulnerability enables more sophisticated attack vectors where attackers could target and delete security-critical files, potentially leading to privilege escalation or further system compromise.
This vulnerability aligns with CWE-22 Path Traversal and CWE-77 Path Traversal in the Common Weakness Enumeration catalog, representing a well-documented class of security flaws that have plagued numerous web applications over the years. The attack pattern follows established techniques documented in the MITRE ATT&CK framework under the T1059.007 command and scripting interpreter category, where attackers leverage legitimate system utilities to execute malicious file operations. The vulnerability demonstrates poor input validation practices and highlights the critical importance of implementing proper access controls and file system boundary checks in web applications that handle user-supplied data.
The remediation for this vulnerability requires implementing proper input sanitization and validation mechanisms that prevent path traversal sequences from being processed by the `unlink()` function. Organizations should immediately upgrade to version 26.0 or later which includes the necessary fixes to prevent unauthorized file system access. Additionally, system administrators should implement proper access controls and authentication mechanisms to limit who can access the clone server functionality, reducing the attack surface for potential exploitation. Security monitoring should be enhanced to detect unusual file deletion patterns and unauthorized access attempts to critical system files. The fix demonstrates the importance of following secure coding practices and implementing proper input validation as fundamental requirements for maintaining application security and preventing privilege escalation attacks.