CVE-2025-27210 is a high-severity vulnerability affecting the Node.js path.join API specifically for Windows users. This vulnerability allows for the incomplete fix of CVE-2025-23084, which impacts reserved Windows device names like CON, PRN, and AUX. The potential for exploitation is significant, given the nature of the affected API and its use in various applications.
With a CVSS score of 7.5, this vulnerability is categorized as high severity, indicating that organizations must prioritize patching immediately. The risk to organizations includes unauthorized file system access and potential data exposure, particularly in environments where the affected API is widely utilized. Given the exploitability of this vulnerability, defenders should act swiftly to mitigate potential impacts.
The vulnerability's exploitation status is currently marked as high, with confirmed exploit availability. This means that attackers may leverage this vulnerability to gain unauthorized access or execute malicious code. Organizations are urged to implement the necessary patches as soon as they are available to reduce exposure to these risks.
Organizations using Node.js in Windows environments should conduct a thorough assessment of their systems and applications to identify any dependencies on the affected path.join API. Immediate action is required to secure environments against potential exploitation.
Vulnerability Details
An incomplete fix has been identified for CVE-2025-23084 in Node.js, specifically affecting Windows device names like CON, PRN, and AUX. This vulnerability affects Windows users of the `path.join` API.
The CVSS score for this vulnerability is 7.5, which categorizes it as high severity. The attack vector is network-based, with low attack complexity and no privileges required for exploitation. The confidentiality impact is high, while the integrity and availability impacts are none.
This vulnerability falls under CWE-22, which indicates improper limitation of a pathname to a restricted directory. It highlights the importance of input validation in software development.
Technical Analysis
The root cause of CVE-2025-27210 lies in the incomplete implementation of fixes for previous vulnerabilities. Specifically, the path.join API allows for the manipulation of file paths, which can lead to unauthorized access to system resources when combined with reserved device names.
The attack vector for this vulnerability is network-based, allowing attackers to exploit it remotely. The attack complexity is low, meaning that minimal skill is required for potential attackers to leverage this vulnerability. Importantly, no user interaction is required, making it easier for an attacker to exploit affected systems.
The confidentiality impact is significant, as successful exploitation could result in sensitive data exposure. However, there is no integrity or availability impact associated with this vulnerability.
Risk & Impact Analysis
Real-world deployment of this vulnerability poses a serious risk to organizations using Node.js on Windows platforms. The inclusion of reserved device names in file paths can lead to unauthorized access to critical system files, potentially allowing attackers to manipulate file systems or extract sensitive information.
The blast radius for this vulnerability can be extensive, particularly in environments where Node.js is utilized for web applications or services. Given the high CVSS score, organizations should treat this vulnerability with urgency and prioritize remediation efforts.
The urgency assessment is critical; organizations must patch immediately to prevent unauthorized access and mitigate potential data breaches. Continuous monitoring and assessment of systems for vulnerabilities should also be a priority.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected by this vulnerability. Organizations should ensure that they are running the latest version of Node.js to mitigate this risk.
Mitigation & Remediation
To remediate this vulnerability, organizations should apply the latest security patches released by Node.js. Regular updates and maintenance are crucial to ensure systems are protected against known vulnerabilities.
In addition to patching, organizations should consider implementing configuration hardening and network controls to further protect against potential exploitation. Monitoring for unusual behavior or access patterns may also provide early detection of attempted exploitation.
Organizations should validate remediation through penetration testing to identify any remaining weaknesses.
Detection Guidance
To identify potential exploitation attempts, organizations should monitor logs for indicators of unauthorized access, particularly involving the path.join API. Additionally, behavioral anomalies indicating unexpected file system interactions should be investigated.
Network signatures associated with exploitation attempts may also be useful in detecting malicious activity related to this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-27210 lies in its illustration of the importance of robust input validation within APIs. As attackers become more sophisticated, vulnerabilities like this one can lead to severe consequences for organizations that fail to remediate promptly.
This vulnerability represents a trend towards increased scrutiny of how software handles reserved file names, particularly within Windows environments. Security teams should take this as an opportunity to review their coding practices and ensure that similar vulnerabilities are not present in their applications.
Implementing a comprehensive vulnerability management program can help organizations proactively identify and mitigate risks associated with vulnerabilities like CVE-2025-27210.
Continuous penetration testing is another vital strategy for maintaining security posture in the face of evolving threats.
Red teaming services can provide additional insights into potential weaknesses and enhance defensive strategies.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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