CVE-2026-33319 in AVideo
Summary
by MITRE • 03/22/2026
WWBN AVideo is an open source video platform. Prior to version 26.0, the `uploadVideoToLinkedIn()` method in the SocialMediaPublisher plugin constructs a shell command by directly interpolating an upload URL received from LinkedIn's API response, without sanitization via `escapeshellarg()`. If an attacker can influence the LinkedIn API response (via MITM, compromised OAuth token, or API compromise), they can inject arbitrary OS commands that execute as the web server user. Version 26.0 contains a fix for the issue.
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Analysis
by VulDB Data Team • 03/27/2026
The vulnerability identified as CVE-2026-33319 affects the WWBN AVideo platform, specifically targeting the SocialMediaPublisher plugin version prior to 26.0. This issue represents a critical command injection flaw that arises from improper input validation within the uploadVideoToLinkedIn() method. The vulnerability stems from the plugin's construction of shell commands through direct string interpolation of data obtained from LinkedIn's API response, creating an avenue for arbitrary code execution. The affected system processes the upload URL returned by LinkedIn's API without implementing proper shell argument escaping mechanisms, leaving the platform susceptible to malicious command injection attacks.
The technical flaw manifests in the absence of proper sanitization when incorporating external data into shell command execution contexts. According to CWE-78, this vulnerability maps directly to improper neutralization of special elements used in OS commands, a well-documented weakness that allows attackers to inject malicious commands through improperly validated input. The specific implementation error occurs when the plugin uses the upload URL directly in shell command construction rather than employing escapeshellarg() or equivalent sanitization functions. This pattern creates a command injection vulnerability that can be exploited by attackers who compromise the LinkedIn API response through various means including man-in-the-middle attacks, OAuth token compromise, or direct API compromise.
The operational impact of this vulnerability is severe and far-reaching, as successful exploitation allows attackers to execute arbitrary operating system commands with the privileges of the web server user. This privilege escalation capability provides attackers with significant control over the affected system, potentially enabling them to access sensitive data, modify system configurations, install malware, or establish persistent backdoors. The vulnerability affects the entire AVideo platform's security posture since the SocialMediaPublisher plugin is part of the core functionality, and the compromised web server user typically has access to application files, databases, and system resources. Attackers could leverage this vulnerability to gain unauthorized access to user data, videos, and other sensitive information stored within the platform's infrastructure.
The attack vectors for this vulnerability include three primary compromise scenarios that demonstrate the breadth of potential threat actors. First, man-in-the-middle attacks can intercept and modify LinkedIn API responses to inject malicious commands into the upload URL field. Second, compromised OAuth tokens could enable attackers to manipulate API responses through legitimate authentication channels. Third, direct compromise of the LinkedIn API itself would provide the most straightforward path for command injection. These attack vectors align with ATT&CK technique T1059.001 for command and scripting interpreter, specifically focusing on the execution of operating system commands through shell injection. The vulnerability's remediation in version 26.0 addresses the core issue by implementing proper shell argument escaping, demonstrating the importance of input validation and sanitization in preventing command injection attacks. Organizations using affected versions should immediately implement the patch to prevent potential exploitation and maintain the integrity of their video platform infrastructure.