CVE-2025-0863: Flexmls Idx Plugin

Medium severity, CVSS 6.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Flexmls® IDX Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'idx_frame' shortcode in all versions up to, and including, 3.14.27 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

• Flexmls Flexmls Idx Plugin: up to and including 3.14.28

Published 2025-03-07. Last modified 2026-06-17.