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Blocksy Companion WordPress Plugin Stored Cross-Site Scripting Vulnerability

Vulnerability

A stored cross-site scripting vulnerability has been identified in the Blocksy Companion plugin for WordPress, affecting all versions through 2.1.14. The issue arises from inadequate input sanitization and output escaping of user-supplied attributes in the 'blocksy_newsletter_subscribe' shortcode. This vulnerability allows authenticated attackers with contributor-level access or higher to inject arbitrary web scripts into pages, which are executed when users access the affected pages.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user viewing the page.

Remediation

Users can update to Blocksy Companion version 2.1.15 or a newer patched version to address this vulnerability.

Added: Oct 30, 2025, 5:18 AM
Updated: Oct 30, 2025, 5:18 AM

Vulnerability Rating

Custom Algorithm
spread
1.0
impact
1.7
exploitability
5.8
remediation
7.7
relevance
0.9
threat
3.2
urgency
2.9
incentive
1.7

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.