CVE-2026-74932 WP Fastest Cache 0.9.0.3 - 1.5.0 - Unauthenticated Stored XSS via Host Header Cache Poisoning
Unauthenticated attackers can poison cached pages via Host header injection, executing arbitrary JavaScript for all subsequent visitors.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-74932?
CVE-2026-74932 is a high-severity cross-site scripting vulnerability in Unknown WP Fastest Cache, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-74932?
How do I fix CVE-2026-74932?
No fix has been published for CVE-2026-74932 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-74932 being exploited?
There is no known exploitation of CVE-2026-74932 in the wild and no public exploit code.
Sources
Also known as GHSA-862p-vrqf-hqpw.