Vulnerability · Published Aug 23, 2026 · Assigned by WPScan
CVE-2026-77115Brave Popup Builder < 0.8.6 - Unauthenticated Reflected XSS via UTM Parameters
High 7.1
In plain English
A high-severity cross-site scripting in Brave from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).
Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.3%top 83.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Brave Popup Builder (brave-popup-builder) up to version 0.8.5 reflects UTM query parameters into popup form HTML without escaping them.
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
References
- https://wpscan.com/vulnerability/d4a760c0-8e71-4261-a08b-9b6a296c631a/ exploit, vdb-entry, technical-description