The MailArchiver plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 4.4.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Mailarchiver Plugin | — | Update mailarchiver plugin to version 4.5.0, or a newer patched version | May 4, 2026 | Mar 6, 2026 |
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