Vulnerability · Published Aug 25, 2026 · Assigned by WPScan

CVE-2026-74932WP Fastest Cache 0.9.0.3 - 1.5.0 - Unauthenticated Stored XSS via Host Header Cache Poisoning

High 7.5

In plain English

A high-severity cross-site scripting in WP Fastest Cache from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 68.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The WP Fastest Cache WordPress plugin before 1.5.1 does not validate the Host header before using it to build the URLs of the asset files it embeds in the pages it caches, and does not include that header in the cache key, allowing unauthenticated attackers to poison cached pages with references to a server they control and have arbitrary JavaScript run for every subsequent visitor.

Affected products (as reported)

Vendor	Product	Versions
Unknown	WP Fastest Cache	0.9.0.3 – before 1.5.1

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

References

https://wpscan.com/vulnerability/f1eebb4a-cfd1-419e-852d-e5a949437afb/ exploit, vdb-entry, technical-description