CVE-2026-19760

WP Fastest Cache <= 1.5.0 - Unauthenticated Stored Cross-Site Scripting via HTTP Host Header

Published Aug 26, 2026 CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Emrevona
Emrevona wp Fastest Cache – Wordpress Cache Plugin
Wordpress
Wordpress wordpress
Vendors & Products Emrevona
Emrevona wp Fastest Cache – Wordpress Cache Plugin
Wordpress
Wordpress wordpress
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title WP Fastest Cache <= 1.5.0 - Unauthenticated Stored Cross-Site Scripting via HTTP Host Header
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Wordfence
Published
Updated
Aug 26, 2026, 2:54 PM
Reserved
Aug 13, 2026, 4:32 PM
Status
Deferred
Published
Aug 26, 2026, 6:16 AM
Modified
Aug 26, 2026, 4:19 PM