GitHub Advisoryadvisory · npm

GHSA-95jq-xph2-cx9h Linkify Allows Prototype Pollution & HTML Attribute Injection (XSS)

HIGH Published 2025-07-26 Modified 2026-06-26 Official page ↗
Aliases
CVE-2025-8101
Ecosystem
npm
Packages
linkifyjs
Severity
High
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
Weaknesses
CWE-1321
Reviewed
2025-07-29

Affected packages

• npm linkifyjs: >= 4.3.1, < 4.3.2 → fixed in 4.3.2

Description

Prototype Pollution in internal `assign()` helper in Linkify allows remote attackers to execute arbitrary JavaScript (Stored or Reflected XSS) via injection of event handlers through unfiltered proto property. This issue affects Linkify version 4.3.1 and is fixed in 4.3.2.

Related

Alias · CVE (1)

  • CVE-2025-8101 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability in Linkify (linkifyjs) allows XSS… vulnerability

Weakness · CWE (1)

  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes weakness

References