The PostmarkApp Email Integrator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin settings in versions up to, and including, 2.4. This is due to insufficient input sanitization and output escaping on the pma_api_key and pma_sender_address parameters. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the settings page.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Postmarkapp Email Integrator Plugin | — | Update postmarkapp-email-integrator plugin to version 2.5.0, or a newer patched version | Jul 13, 2026 | Feb 18, 2026 |
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