8.8

CVE-2026-12954: mapster mapster_wp_maps Improper Input Validation

CVSS: 8.8v3.1HighDeferred
Published 18-09-2026Last modified 19-09-2026
Open JSON

Vulnerability summary

CVE-2026-12954 is a high (CVSS 8.8) Improper Input Validation vulnerability in mapster mapster_wp_maps. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.2% of scored vulnerabilities. Fixed in 1.24.0.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.46%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 18-09-2026
    PublishedVulnerability first disclosed.
  2. 19-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

0.00 pp

From 0.46% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Mapster1 product
Wordpress1 product
  • mapster-wp-maps≤ 1.23.0 (fixed in 1.24.0)

2 vendors · 2 products

References

7 links