CVE-2025-25214 identifies a race condition vulnerability (CWE-362) in the unzip functionality of the aVideoEncoder.json.php script within WWBN's AVideo product, specifically version 14.4 and the development master commit 8a8954ff. The flaw stems from improper synchronization when handling concurrent HTTP requests that invoke the unzip process, allowing multiple threads or processes to access and modify shared resources simultaneously without adequate locking mechanisms. This concurrency issue can be exploited by an attacker who crafts a sequence of HTTP requests designed to trigger the race condition, ultimately enabling arbitrary code execution on the server hosting AVideo. The vulnerability requires low privileges (PR:L) and no user interaction (UI:N), making it easier to exploit remotely over the network (AV:N). The impact is severe, affecting confidentiality, integrity, and availability (C:H/I:H/A:H), as attackers can execute arbitrary code, potentially leading to full system compromise. Although no public exploits have been reported yet, the vulnerability's nature and high CVSS score of 8.8 indicate a critical risk. The flaw affects aVideoEncoder.json.php's unzip functionality, which is likely used to process uploaded video archives or related content, making media servers running AVideo particularly vulnerable. The vulnerability was reserved on July 9, 2025, and published on July 24, 2025, by Talos, with no official patches currently available, emphasizing the need for immediate mitigation.

For European organizations, this vulnerability poses a significant threat, especially those relying on WWBN AVideo for video hosting, streaming, or content management. Successful exploitation can lead to arbitrary code execution, allowing attackers to take control of affected servers, steal sensitive data, disrupt services, or use compromised infrastructure for further attacks. Media companies, educational institutions, and enterprises using AVideo for internal or public-facing video services are at particular risk. The compromise of such systems could result in data breaches, service outages, reputational damage, and regulatory penalties under GDPR if personal data is exposed. Given the network attack vector and lack of user interaction requirement, attackers can remotely exploit this vulnerability with relative ease once they have low-level access or can send crafted HTTP requests. The absence of known exploits in the wild currently provides a window for proactive defense, but the high severity demands urgent attention to prevent potential future attacks.

1. Immediately restrict access to the aVideoEncoder.json.php endpoint, especially the unzip functionality, by implementing network-level controls such as IP whitelisting or VPN-only access. 2. Apply strict input validation and sanitization on all HTTP requests targeting the unzip functionality to prevent malformed or malicious payloads. 3. Implement application-level concurrency controls, such as mutexes or locks, to ensure proper synchronization when accessing shared resources during unzip operations. 4. Monitor web server and application logs for unusual patterns of HTTP requests targeting the vulnerable endpoint, including rapid or repeated unzip requests. 5. If possible, isolate the AVideo server in a segmented network zone with limited access to critical infrastructure. 6. Engage with WWBN for official patches or updates and plan for rapid deployment once available. 7. Consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block exploit attempts targeting this vulnerability. 8. Conduct regular security assessments and penetration testing focused on concurrency and race condition vulnerabilities in the application.