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

CVE-2021-29491

Severity High
Score 7.1/10

Summary

** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: CVE-2021-28860. Reason: This candidate is a reservation duplicate of CVE-2021-28860. Notes: All CVE users should reference CVE-2021-28860 instead of this candidate. All references and descriptions in this candidate have been removed to prevent accidental usage.

  • LOW
  • NETWORK
  • LOW
  • UNCHANGED
  • NONE
  • LOW
  • NONE
  • 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.

Advisory Timeline

  • Published