CVE-2026-12954 json
Mapster WP Maps <= 1.23.0 - Authenticated (Subscriber+) Arbitrary User Meta Write via 'acf-photo-gallery-groups' Parameter
published 2026-09-18 52 d ago modified 2026-09-19 51 d ago also EUVD-2026-82756
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 51 d ago
Exploit prediction
0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- mapster Mapster WP Maps
Classification
- Weakness
-
- CWE-20 Improper Input Validation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/a70757f7-63a0-452a-a078-0fb7f82844b6?source=cve
- plugins.trac.wordpress.org /browser/mapster-wp-maps/tags/1.21.0/includes/acf-photo-gallery-field/includes/acf_photo_gallery_save.php#L47
- plugins.trac.wordpress.org /browser/mapster-wp-maps/tags/1.23.0/includes/acf-photo-gallery-field/includes/acf_photo_gallery_save.php#L47
- plugins.trac.wordpress.org /browser/mapster-wp-maps/tags/1.23.0/includes/acf-photo-gallery-field/includes/acf_photo_gallery_save.php#L43
- plugins.trac.wordpress.org /browser/mapster-wp-maps/tags/1.21.0/includes/acf-photo-gallery-field/includes/acf_photo_gallery_save.php#L43
- plugins.trac.wordpress.org /changeset?reponame=&old=3611280%40mapster-wp-maps&new=3611280%40mapster-wp-maps
Sources
- CVE List CVE-2026-12954
- NVD CVE-2026-12954
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.