CVE-2025-0521

Name of the Vulnerable Software and Affected Versions Post SMTP plugin for WordPress versions up to, and including, 3.0.2

Description The issue is related to Stored Cross-Site Scripting due to insufficient input sanitization and output escaping. This allows unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The from and subject parameters are specifically vulnerable to this type of attack.

Recommendations For Post SMTP plugin for WordPress versions up to, and including, 3.0.2, update to version 3.0.3 or later to resolve the issue. As a temporary workaround, consider restricting access to the from and subject parameters in the affected plugin until a patch is applied.