The Mapster WP Maps plugin for WordPress is vulnerable to Arbitrary User Meta Write in all versions up to, and including, 1.23.0 via the `my_profile_update()` function. This is due to the function performing no nonce verification, no capability check, and no allowlist validation on the meta key supplied via the `acf-photo-gallery-groups` POST parameter before passing both the meta key and its corresponding value directly to `update_user_meta()`. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update arbitrary user meta values, though privilege escalation is not possible.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Mapster Wp Maps Plugin | — | Update mapster-wp-maps plugin to version 1.24.0, or a newer patched version | Oct 30, 2026 | Sep 17, 2026 |
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