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Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

CVE-2018-16489

High
9.8/10

Summary

A prototype pollution vulnerability was found in just-extend prior to 4.0.0 that allows attack to inject properties onto "Object.prototype" through its functions.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-1321 - Prototype Pollution

Prototype pollution is one of the lesser-known vulnerabilities. It allows attackers to abuse the rules of JavaScript by injecting properties into the general object “Object” in JS. Modifying the prototype of “Object” affects the behavior of all objects in the entire app, potentially resulting in denial of service, arbitrary code execution, cross-site scripting, etc.

References

Advisory Timeline

  • Published