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

CVE-2025-8101

High
8.8/10

Summary

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability in Linkify (linkifyjs) allows Cross-Site Scripting (XSS) Targeting HTML Attributes and Manipulating User-Controlled Variables. This issue affects Linkify versions prior to 4.3.2.

  • LOW
  • NETWORK
  • NONE
  • NONE

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