CVE-2025-9854: Piupiiu A Simple Multilanguage Plugin

Medium severity, CVSS 6.4. EPSS: 0.2% chance of exploitation in the next 30 days.

The A Simple Multilanguage Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'asmp-switcher' shortcode in all versions up to, and including, 1.0 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

• Piupiiu A Simple Multilanguage Plugin: up to and including 1.0

Published 2025-10-03. Last modified 2026-10-08.