CVE-2026-12954: Mapster Wp Maps

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Mapster Mapster Wp Maps: up to and including 1.23.0

Published 2026-09-18. Last modified 2026-09-19.