CVE-2026-19760
WP Fastest Cache <= 1.5.0 - Unauthenticated Stored Cross-Site Scripting via HTTP Host Header
The WP Fastest Cache – WordPress Cache Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via HTTP Host Header in all versions up to, and including, 1.5.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the Polylang or Polylang Pro plugin to be active and the Combine JS option to be enabled, as these conditions trigger the vulnerable Host-header-to-URL code path that writes attacker-controlled script src values into the shared page-cache file served to all subsequent visitors.
| CWE | CWE-79 |
| Vendor | emrevona |
| Product | wp fastest cache – wordpress cache plugin |
| Published | Aug 26, 2026 |
| Last Updated | Aug 26, 2026 |
Get instant alerts for emrevona wp fastest cache – wordpress cache plugin
Be the first to know when new high vulnerabilities affecting emrevona wp fastest cache – wordpress cache plugin are published — delivered to Slack, Telegram or Discord.
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N