CVE-2026-33648 in AVideo
Summary
by MITRE • 03/23/2026
WWBN AVideo is an open source video platform. In versions up to and including 26.0, the restreamer endpoint constructs a log file path by embedding user-controlled `users_id` and `liveTransmitionHistory_id` values from the JSON request body without any sanitization. This log file path is then concatenated directly into shell commands passed to `exec()`, allowing an authenticated user to achieve arbitrary command execution on the server via shell metacharacters such as `$()` or backticks. Commit 99b865413172045fef6a98b5e9bfc7b24da11678 contains a patch.
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Analysis
by VulDB Data Team • 03/28/2026
The vulnerability identified as CVE-2026-33648 affects the WWBN AVideo platform, an open source video management system that has been widely adopted for hosting and streaming video content. This security flaw exists in versions up to and including 26.0, representing a critical command injection vulnerability that can be exploited by authenticated users with minimal privileges. The vulnerability stems from improper input validation within the restreamer endpoint, which processes user requests containing sensitive identifiers that should never be directly incorporated into system operations without proper sanitization. The affected system architecture processes user-controlled data through a critical code path that directly influences shell command execution, creating a direct pathway for arbitrary code execution.
The technical implementation of this vulnerability occurs when the restreamer endpoint receives a JSON request containing `users_id` and `liveTransmitionHistory_id` parameters that are immediately used to construct a log file path. This path construction process fails to implement any form of input sanitization or validation, allowing maliciously crafted values to contain shell metacharacters such as `$()`, backticks, or other command injection vectors. When these unvalidated parameters are concatenated directly into shell commands passed to the exec() function, the system becomes vulnerable to arbitrary command execution. The vulnerability is particularly dangerous because it requires only authenticated access, meaning that any user with valid credentials can exploit this flaw to execute arbitrary commands with the privileges of the web server process. The commit 99b865413172045fef6a98b5e9bfc7b24da11678 provides a patch that addresses this specific issue by implementing proper input sanitization and parameter validation before shell command construction.
The operational impact of this vulnerability extends beyond simple command execution, as it can enable attackers to gain full control over the affected server. An authenticated attacker could leverage this vulnerability to escalate privileges, access sensitive data, modify system configurations, or even establish persistent backdoors within the platform. The vulnerability aligns with CWE-78, which specifically addresses OS Command Injection, and represents a classic example of how insufficient input validation can lead to severe security consequences. From an ATT&CK framework perspective, this vulnerability maps to T1059.001 (Command and Scripting Interpreter: Shell Script) and T1566 (Phishing) as attackers could use this vulnerability to establish initial access and then move laterally within the network. The impact is particularly severe for organizations using AVideo as their primary video platform, as it could compromise entire video streaming infrastructures and potentially expose sensitive user data or copyrighted content.
The mitigation strategy for this vulnerability requires immediate patching of all affected systems to the fixed version that implements proper input sanitization. Organizations should also implement network segmentation to limit access to the restreamer endpoint and consider implementing additional authentication layers for critical operations. Security monitoring should be enhanced to detect unusual command execution patterns, and regular vulnerability assessments should be conducted to identify similar input validation flaws within the application. The fix implemented in commit 99b865413172045fef6a98b5e9bfc7b24da11678 demonstrates the importance of proper input validation and parameter sanitization in preventing command injection attacks, serving as a critical lesson for developers working with system-level operations and shell command execution in web applications.