Medium CVSS 4.3

Overview

Avant Browser 11.7 Builds 35 and 36 allows remote attackers to spoof the address bar, via window.open with a relative URI, to show an arbitrary URL on the web site visited by the victim, as demonstrated by a visit to an attacker-controlled web page, which triggers a spoofed login form for the site containing that page. NOTE: a related attack was reported in which an arbitrary file: URL is shown.

Risk analysis

This vulnerability is rated 🟡 MEDIUM.

  • CVSS: 4.3 (MEDIUM)
  • Detected tags: none (tag impact: LOW)

Recommended actions:

  • Prioritize remediation based on business criticality and exposure.
  • Limit exposure and increase monitoring until fixed.

Recommended tools

Tags