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The AcyMailing plugin for WordPress is vulnerable to privilege escalation in all versions From 9.11.0 up to, and including, 10.8.1 due to a missing capability check on the `wp_ajax_acymailing_router` AJAX handler. This makes it possible for authenticated attackers, with Subscriber-level access and above, to access admin-only controllers (including configuration management), enable the autologin feature, create a malicious newsletter subscriber with an injected `cms_id` pointing to any WordPress user, and then use the autologin URL to authenticate as that user, including administrators.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Acymailing Plugin | — | Update acymailing plugin to version 10.8.2, or a newer patched version | Apr 30, 2026 | Apr 15, 2026 |
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