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

CVE-2021-23594

High
10/10

Summary

All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.

  • LOW
  • NETWORK
  • HIGH
  • CHANGED
  • 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