Description
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.
References6
- plugins.trac.wordpress.org/browser/mapster-wp-maps/tags/1.21.0/…
- plugins.trac.wordpress.org/browser/mapster-wp-maps/tags/1.21.0/…
- plugins.trac.wordpress.org/browser/mapster-wp-maps/tags/1.23.0/…
- plugins.trac.wordpress.org/browser/mapster-wp-maps/tags/1.23.0/…
- plugins.trac.wordpress.org/changeset?reponame=&old=3611280%40ma…
- www.wordfence.com/threat-intel/vulnerabilities/id/a70757f7-63a0…
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 51 · as of 8 November 2026
- CWE
- CWE-20
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.