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8.8

Mapster WP Maps lets logged‑in users edit any profile field

CVE-2026-12954 · published 1 month ago
Summary

The Mapster WP Maps plugin for WordPress lets anyone with a basic user account change any stored user information by sending a specially crafted request. Because the plugin does not verify the request or limit which data can be modified, an attacker could alter profile details of other users. Update the plugin to the latest version or apply a patch that adds proper checks to stop unauthorized changes.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
mapster mapster wp maps <= 1.23.0
Original advisory text
Mapster WP Maps <= 1.23.0 - Authenticated (Subscriber+) Arbitrary User Meta Write via 'acf-photo-gallery-groups' Parameter
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.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
8.8 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-20Improper Input Validation
Timeline
Published18 Sep 2026
Updated4 Nov 2026
First seen18 Sep 2026
Sources
CVE-2026-12954 · NVD
CVE-2026-12954 · MITRE
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