How severe is CVE-2026-12902?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Stellarwp Kadence Blocks — Page Builder Toolkit For Gutenberg Editor

CVE-2026-12902

The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.7.7. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to create arbitrary Media Library attachments by downloading remote images to the site's uploads directory via wp_upload_bits() and wp_insert_attachment(), bypassing the upload_files capability boundary.

Vulnerability class: Broken Access Control

Published 2026-07-01 · last modified 2026-07-01.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (38.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Stellarwp Kadence Blocks — Page Builder Toolkit For Gutenberg Editor — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

Frequently asked questions

What is CVE-2026-12902?: CVE-2026-12902 is a medium-severity vulnerability in Stellarwp Kadence Blocks — Page Builder Toolkit For Gutenberg Editor, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-07-01.
How severe is CVE-2026-12902?: Medium severity. CVSS v3 base score is 4.3 out of 10.