CVE-2026-77115CWE-79cross-site-scripting

CVE-2026-77115

High · published August 23, 2026

CVSS v3.1
7.1
EPSS
0%
Percentile
15.7
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00251 · 15.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-08-23T10:17Z
References (1)
https://wpscan.com/vulnerability/d4a760c0-8e71-4261-a08b-9b6a296c631a/ · [email protected]
EPSS history
Timeline
  • 23 AUG 06:00Z
    Brave Popup Builder < 0.8.6 - Unauthenticated Reflected XSS via UTM Parameters
    cvelistv5