The Newsletter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the newsletter_form shortcode in versions up to, and including, 7.8.9 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Newsletter | Thenewsletterplugin | * | 7.8.9 (including) |