CVE-2026-8887: Konforti Listen Shortcode

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

The Listen Shortcode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'listen' shortcode in versions up to, and including, 1.0. This is due to insufficient input sanitization and output escaping on user supplied attributes (src, start, end) in the listenEmbedJS() function, which are echoed inside a single-quoted HTML attribute without escaping. 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

• Konforti Listen Shortcode: up to and including 1.0

Published 2026-05-27. Last modified 2026-06-17.