CVE-2025-25214: Race Condition Vulnerability in WWBN AVideo 14.4 Leading to Arbitrary Code Execution

Overview

This blog post serves to inform and educate about the critical vulnerability identified as CVE-2025-25214 in WWBN AVideo 14.4 and the dev master commit 8a8954ff. This vulnerability stems from a race condition in the aVideoEncoder.json.php unzip functionality, which can be exploited to execute arbitrary code. As a cybersecurity threat, this vulnerability poses a significant risk to organizations that utilize WWBN AVideo 14.4, potentially leading to system compromise or data leakage.
This vulnerability matters because of the potential for malicious actors to take control of systems, access sensitive information, or disrupt services. Given the severity of this vulnerability, it is crucial for organizations to promptly apply available patches or implement temporary mitigation measures to minimize the risk of exploitation.

Vulnerability Summary

CVE ID: CVE-2025-25214
Severity: High (8.8 CVSS Score)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

WWBN AVideo | 14.4 and dev master commit 8a8954ff

How the Exploit Works

The exploit takes advantage of a race condition in the aVideoEncoder.json.php unzip functionality. A race condition is a state where the system’s behavior is dependent on the sequence or timing of events that are uncontrollable by the system. In this case, a series of specially crafted HTTP requests can exploit this race condition to execute arbitrary code.
The attacker sends several HTTP requests to the vulnerable endpoint. The timing and sequence of these requests trigger the race condition, allowing the attacker to manipulate the process and execute malicious code.

Conceptual Example Code

Here is a conceptual example of how the vulnerability might be exploited. This sample HTTP request is designed to trigger the race condition and execute arbitrary code:

POST /AVideoEncoder.json.php/unzip HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "malicious_payload": "arbitrary_code_here" }

Note: This example is purely conceptual and may not represent an actual exploit. It is for educational purposes only and should not be used for malicious activities.

Mitigation Guidance

The best way to mitigate this vulnerability is to apply the vendor patch as soon as it becomes available. In the meantime, utilizing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure, helping to monitor and block potential malicious traffic aiming to exploit the vulnerability.