Article Title:
Critical Zero-Click Vulnerability in AVideo Platform Enables Unauthenticated Stream Hijacking
Article Text:
A critical security flaw has been identified in AVideo, a widely utilized open-source video hosting and streaming platform. Designated as CVE-2026-29058, this zero-click vulnerability allows unauthenticated attackers to execute arbitrary operating system commands on the affected server, posing severe risks to system integrity and data security.
Discovery and Impact
Security researcher Arkmarta discovered this vulnerability, which specifically affects AVideo version 6.0. The flaw has been addressed in version 7.0 and subsequent releases. Classified under CWE-78, which pertains to the improper neutralization of special elements in an OS command, this network-based attack requires neither system privileges nor user interaction. Successful exploitation could lead to complete server compromise, unauthorized access to sensitive configuration data, and full control over live video streams.
Technical Details
The vulnerability originates in the `objects/getImage.php` component of the AVideo platform. The issue arises when the application processes network requests containing a `base64Url` parameter. The platform decodes this user-supplied input and incorporates it directly into a double-quoted `ffmpeg` shell command. Although the software attempts to validate the input using standard URL filters, these checks only verify basic URL syntax and fail to neutralize dangerous shell metacharacters or command substitution sequences. Consequently, remote attackers can append malicious instructions, enabling them to execute arbitrary code, extract internal credentials, or disrupt the server’s streaming capabilities.
Mitigation and Recommendations
Administrators operating AVideo-Encoder version 6.0 are strongly advised to upgrade to version 7.0 or later to secure their systems. The patched release addresses the issue by implementing strict shell argument escaping, utilizing functions like `escapeshellarg()`. This fix ensures that all user-supplied input is properly sanitized before interacting with the command line, effectively preventing attackers from manipulating the command structure.
If immediate software upgrades are not feasible, security teams should implement temporary workarounds to protect their streaming infrastructure. Recommended measures include:
– Restricting Access: Limit access to the vulnerable `objects/getImage.php` endpoint at the web server or reverse proxy layer using strict IP allowlisting.
– Deploying Web Application Firewalls (WAF): Apply WAF rules designed to inspect and actively block suspicious Base64-encoded shell command patterns.
– Disabling Unnecessary Components: If the image retrieval component is not essential for daily operations, consider disabling it entirely to eliminate the attack vector.
Broader Implications
This vulnerability underscores the critical importance of rigorous input validation and secure coding practices in web applications, especially those handling multimedia content. Similar vulnerabilities have been identified in other platforms, highlighting a recurring challenge in the cybersecurity landscape.
For instance, a critical vulnerability in the DNN Platform allowed attackers to execute malicious scripts through the platform’s Prompt module. This flaw, tracked as CVE-2025-59545, affected all DNN Platform versions prior to 10.1.0 and permitted attackers to inject and execute malicious scripts within the application’s trusted environment.
Similarly, a severe injection vulnerability in the XWiki Platform, designated as CVE-2025-24893, allowed unauthenticated attackers to execute arbitrary remote code. This flaw was actively exploited, emphasizing the dangers of eval injection in web applications, particularly those handling search functionalities.
Conclusion
The discovery of CVE-2026-29058 in the AVideo platform serves as a stark reminder of the ever-present threats in the digital landscape. Organizations must remain vigilant, promptly apply security patches, and adhere to best practices in software development and deployment to safeguard their systems against such vulnerabilities.
