---
id: CVE-2026-77115
title: >-
  Brave Popup Builder (brave-popup-builder) up to version 0.8.5 reflects UTM
  query parameters into popup form HTML without escaping them.
summary: >-
  Brave Popup Builder (brave-popup-builder) up to version 0.8.5 reflects UTM
  query parameters into popup form HTML without escaping them.
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L'
cwe:
  - CWE-79
published: '2026-08-23'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T16:10:00.220'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77115'
references:
  - url: 'https://wpscan.com/vulnerability/d4a760c0-8e71-4261-a08b-9b6a296c631a/'
    label: contact@wpscan.com
tags:
  - nvd
epss: 0.00251
epssPercentile: 0.15259
ingestedAt: '2026-10-12T16:57:59.892Z'
---

## Overview

Brave Popup Builder (brave-popup-builder) up to version 0.8.5 reflects UTM query parameters into popup form HTML without escaping them.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.