CVE-2023-4308: Plugin-Planet User Submitted Posts

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

The User Submitted Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘user-submitted-content’ parameter in versions up to, and including, 20230809 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.

Affected products

• Plugin-Planet User Submitted Posts: before 20230811 (fixed in 20230811)

Published 2023-08-15. Last modified 2026-06-17.