Vulnerability details
CVE-2026-77115
Brave
Brave Popup Builder < 0.8.6 - Unauthenticated Reflected XSS via UTM Parameters
CVSS 3.1
7.1High
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.1High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| — | Brave | v < 0.8.6 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://wpscan.com/vulnerability/d4a760c0-8e71-4261-a08b-9b6a296c631a/ exploitvdb-entrytechnical-description
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Details
- Published
- 2026-08-23
- Last updated
- 2026-08-23
- State
- Published
- Assigner (CNA)
- WPScan
Exploit prediction (EPSS)
0.25%
Probability of exploitation in 30 days
16.6%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')