CVE-2026-57399: Proxy & VPN Blocker

High severity, CVSS 7.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Proxy &amp; VPN Blocker Proxy &amp; VPN Blocker proxy-vpn-blocker allows Stored XSS.This issue affects Proxy &amp; VPN Blocker: from n/a through <= 3.5.8.

Affected products

• Proxy &amp; VPN Blocker Proxy &amp; VPN Blocker: up to and including 3.5.8

Published 2026-07-13. Last modified 2026-07-13.