WP Meteor Website Speed Optimization Addon: Cross-site scripting
WP Meteor Website Speed Optimization Addon is affected by cross-site scripting. The vulnerable path is reachable without authentication. Injected script can execute in the affected site's origin when the vulnerable output is viewed. The published affected range is <= 3.4.16.
- Component
- WP Meteor Website Speed Optimization Addon
- Plugin slug
wp-meteor- Affected
- <= 3.4.16
- Safe version
> 3.4.16- Published
- Apr 29, 2026
This CVE was published Apr 29, 2026 and is one of 3 known issues for this plugin.
Update, patch or deactivate.
Update WP Meteor Website Speed Optimization Addon to a release after 3.4.16, or disable and remove it until a fixed version is available.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The WP Meteor Website Speed Optimization Addon plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'frontend_rewrite' function's 'WPMETEOR[N]WPMETEOR' placeholder content in all versions up to, and including, 3.4.16 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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N