EUVD-2025-21906

Comprehensive Technical Analysis of EUVD-2025-21906

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-21906 pertains to the use of insufficiently random values in the form-data library, which can lead to HTTP Parameter Pollution (HPP). This vulnerability is rated with a Base Score of 9.4 under CVSS version 4.0, indicating a critical severity level. The vector string CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N highlights several key aspects:

• Attack Vector (AV:N): The vulnerability can be exploited remotely over the network.
• Attack Complexity (AC:H): The attack requires a high level of complexity to exploit.
• Authentication (AT:N): No authentication is required to exploit the vulnerability.
• Privileges Required (PR:N): No special privileges are needed.
• User Interaction (UI:N): No user interaction is required.
• Confidentiality Impact (VC:H): High impact on confidentiality.
• Integrity Impact (VI:H): High impact on integrity.
• Availability Impact (VA:N): No impact on availability.
• Scope Change (SC:H): The vulnerability can affect resources beyond the security scope.
• Scope Integrity (SI:H): High impact on the integrity of the affected scope.
• Scope Availability (SA:N): No impact on the availability of the affected scope.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector for this vulnerability is HTTP Parameter Pollution (HPP). An attacker can manipulate HTTP parameters by injecting additional parameters with the same name, leading to unpredictable behavior in the application. This can result in:

• Data Tampering: Altering the values of parameters to manipulate the application's behavior.
• Session Fixation: Forcing a user's session ID to a known value, allowing the attacker to hijack the session.
• Cross-Site Scripting (XSS): Injecting malicious scripts into the application through manipulated parameters.
• SQL Injection: Crafting SQL queries through manipulated parameters to extract or manipulate data.

3. Affected Systems and Software Versions

The vulnerability affects the following versions of the form-data library:

• Versions prior to 2.5.4
• Versions 3.0.0 to 3.0.3
• Versions 4.0.0 to 4.0.3

Any application or system that uses these versions of the form-data library is potentially at risk.

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following steps are recommended:

• Update the Library: Upgrade to a patched version of the form-data library that addresses the vulnerability.
• Input Validation: Implement robust input validation to ensure that all HTTP parameters are properly sanitized and validated.
• Random Value Generation: Ensure that random values used in the library are sufficiently random and unpredictable.
• Monitoring and Logging: Implement monitoring and logging to detect any suspicious activities related to HTTP parameters.
• Security Audits: Conduct regular security audits and code reviews to identify and fix similar vulnerabilities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations that rely on the form-data library. The high severity score and the potential for remote exploitation without authentication make it a critical concern. Organizations must prioritize patching and mitigation efforts to prevent potential data breaches, financial losses, and reputational damage.

6. Technical Details for Security Professionals

• Library File: The vulnerability is associated with the file lib/form_data.js.
• References:
  • GitHub Security Advisory
  • GitHub Commit
• CVE ID: CVE-2025-7783
• Assigner: harborist

Security professionals should review the provided references for detailed technical information and patching instructions. Regular updates and monitoring of security advisories are essential to stay ahead of emerging threats.

Conclusion

The vulnerability described in EUVD-2025-21906 is critical and requires immediate attention. Organizations should prioritize updating the form-data library and implementing robust security measures to mitigate the risk of HTTP Parameter Pollution. Continuous monitoring and regular security audits are essential to maintain a strong cybersecurity posture.