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TI-2026-16026 Aliases CVE-2026-19760GHSA-q9vw-j254-6x3w

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

Priority LOW 38CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00419 36th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
emrevonaWP Fastest Cache – WordPress Cache Pluginup to 1.5.0—No fix listedCNA
  • WP Fastest Cache – WordPress Cache Plugin Vendoremrevona Affected up to 1.5.0 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:wpfastestcache:wp_fastest_cache:*:*:*:*:*:*:*:*——emrevona
  • cpe:2.3:a:wpfastestcache:wp_fastest_cache:*:*:*:*:*:*:*:* Versions — — ·emrevona

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-19760
  2. 2026-10-03 Alias added: GHSA-q9vw-j254-6x3w

References

Other 7

  • TI-2023-01821 WP Fatest Cache < 1.1.5 - Blind SSRF via CSRF CVSS 3.1HIGH 8.8
  • TI-2021-07151 WP Fastest Cache < 0.9.5 - Subscriber+ SQL Injection CVSS 3.1HIGH 8.8
  • TI-2023-05581 WP Fastest Cache < 1.2.2 - Unauthenticated SQL Injection CVSS 3.1HIGH 7.5
  • TI-2020-18971 WP Fastest Cache <= 0.9.0.2 - Authenticated (Subscriber+) Arbitrary File Deletion CVSS 3.1HIGH 8.1
  • TI-2019-10245 The WP Fastest Cache plugin through 0.8.9.5 for WordPress allows wpFastestCache.php and… CVSS 3.0CRITICAL 9.1
  • TI-2021-07152 WP Fastest Cache < 0.9.5 - CSRF to Stored Cross-Site Scripting CVSS 3.1MEDIUM 6.1
See all 33 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences