CVE-2026-96572: WP Meteor Website Speed Optimization Addon <= 3.4.18 - Unauthenticated Stored Cross-Site Scripting via Comment Author Name
The WP Meteor Website Speed Optimization Addon plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Author Name in all versions up to, and including, 3.4.18 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. The payload is delivered via the comment author name field, which must clear WordPress's comment moderation workflow before being displayed, though this represents a display prerequisite rather than any sanitization control.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An unauthenticated attacker can submit a malicious payload through the WordPress comment author name field. No account or user interaction is required for submission.
Does a malicious comment need to be approved before it becomes dangerous?
Yes. The payload must clear the WordPress comment moderation workflow before it is displayed and executes when someone accesses the affected page. Moderation is a display prerequisite, not a sanitization control.
Which installations are affected?
WP Meteor Website Speed Optimization Addon versions up to and including 3.4.18 are affected.
How can I check for potential exploitation?
Review approved comments, particularly their author name values, for unexpected script-like or markup content. Focus on comments displayed on pages where the plugin processes comment author names.