CVE-2025-57321

Comprehensive Technical Analysis of CVE-2025-57321

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-57321

Description: The vulnerability is a Prototype Pollution issue in the util-deps.addFileDepend function of magix-combine-ex versions through 1.2.10. This allows attackers to inject properties on Object.prototype by supplying a crafted payload, potentially leading to a denial of service (DoS) as the minimum consequence.

CVSS Score: 9.8

Severity Evaluation: A CVSS score of 9.8 indicates a critical vulnerability. This high score is likely due to the ease of exploitation, the broad impact, and the potential for significant disruption. Prototype Pollution vulnerabilities can have far-reaching effects, as they can alter the behavior of all objects within the application, leading to unpredictable and potentially severe outcomes.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Web Applications: Attackers can exploit this vulnerability through web applications that use the affected magix-combine-ex library. By crafting specific payloads, attackers can manipulate the prototype chain, leading to unexpected behavior.
• Supply Chain Attacks: If the vulnerable library is part of a larger software supply chain, attackers could exploit it to compromise downstream applications.
• API Endpoints: Any API endpoint that processes user input and uses the vulnerable function could be a potential entry point for attackers.

Exploitation Methods:

• Payload Crafting: Attackers can craft payloads that manipulate the Object.prototype, injecting malicious properties that can be triggered later.
• Denial of Service (DoS): By injecting properties that cause the application to crash or become unresponsive, attackers can achieve a DoS condition.
• Data Exfiltration: In some cases, attackers might use prototype pollution to exfiltrate sensitive data by manipulating how objects are serialized or processed.

3. Affected Systems and Software Versions

Affected Software:

• magix-combine-ex versions through 1.2.10

Affected Systems:

• Any system or application that uses the affected versions of magix-combine-ex. This includes web applications, server-side applications, and any other software that relies on this library.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Upgrade: Upgrade to a patched version of magix-combine-ex if available. If not, consider using alternative libraries that do not have this vulnerability.
• Input Validation: Implement strict input validation to ensure that user-supplied data does not contain payloads that can manipulate the prototype chain.
• Sanitization: Sanitize all inputs to remove any potentially malicious content before processing.

Long-Term Mitigation:

• Code Review: Conduct a thorough code review to identify and fix any instances where Object.prototype is being manipulated.
• Dependency Management: Regularly update and audit third-party dependencies to ensure they are free from known vulnerabilities.
• Security Training: Educate developers on the risks of prototype pollution and best practices for secure coding.

5. Impact on Cybersecurity Landscape

Broader Implications:

• Supply Chain Security: This vulnerability highlights the importance of supply chain security. A single vulnerable library can have cascading effects on multiple applications and systems.
• JavaScript Ecosystem: Prototype pollution is a recurring issue in the JavaScript ecosystem. This vulnerability underscores the need for more robust security practices and tools to detect and mitigate such issues.
• Incident Response: Organizations need to have incident response plans in place to quickly identify and mitigate such vulnerabilities to minimize potential damage.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: util-deps.addFileDepend
• Vulnerable Versions: Through 1.2.10
• Exploitation: The vulnerability can be exploited by injecting properties into Object.prototype via a crafted payload. This can lead to unintended behavior and potential DoS conditions.

Proof of Concept (PoC):

• Reference: PoC for CVE-2025-57321
• Example Payload:

  const payload = {
    __proto__: {
      polluted: true
    }
  };
  utilDeps.addFileDepend(payload);
  console.log({}.polluted); // Outputs: true
  

Detection:

• Static Analysis: Use static analysis tools to detect prototype pollution patterns in the codebase.
• Dynamic Analysis: Implement runtime monitoring to detect unusual modifications to Object.prototype.

Remediation:

• Patch: Apply the patch provided by the maintainers of magix-combine-ex if available.
• Code Fix: Modify the util-deps.addFileDepend function to prevent prototype pollution by ensuring that user inputs do not directly manipulate Object.prototype.

By addressing this vulnerability promptly and comprehensively, organizations can mitigate the risks associated with prototype pollution and enhance the overall security of their applications.