Is CVE-2026-12902 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-12902 being exploited in the wild.

How severe is CVE-2026-12902?

Medium severity, with a CVSS score of 4.3, published 1 July 2026.

Is there a fix for CVE-2026-12902?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-12902 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-12902?

Check whether you run StellarWP Kadence Blocks — Page Builder Toolkit for Gutenberg Editor at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-12902: StellarWP Kadence Blocks authorization bypass in prebuilt library

CVE-2026-12902 · Severity: medium · CVSS 4.3 · Published 2026-07-01

Kadence Blocks, a popular WordPress plugin used for designing website layouts, contains a security flaw that allows certain users to bypass standard upload restrictions. Users with basic contributor-level access can force the website to download and store images from external sources into the site's media library. While this does not allow for full site takeover, it could be used to clutter server storage or host unauthorized content on the organization's domain.

Technologies: StellarWP Kadence Blocks — Page Builder Toolkit for Gutenberg Editor. Vendors: StellarWP.

Quick answers

Is CVE-2026-12902 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-12902 being exploited in the wild.
How severe is CVE-2026-12902?: Medium severity, with a CVSS score of 4.3, published 1 July 2026.
Which products and versions are affected?: StellarWP Kadence Blocks — Page Builder Toolkit for Gutenberg Editor up to, including 3.7.7.
Is there a fix for CVE-2026-12902?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-12902 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-12902?: Check whether you run StellarWP Kadence Blocks — Page Builder Toolkit for Gutenberg Editor at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The Kadence Blocks plugin for WordPress (versions up to 3.7.7) suffers from a missing authorization check (CWE-862) within its prebuilt library functionality. Specifically, the plugin fails to verify the 'upload_files' capability before executing media attachment functions. An authenticated attacker with at least contributor-level privileges can trigger 'wp_upload_bits()' and 'wp_insert_attachment()' to download arbitrary remote images into the WordPress uploads directory. This allows for the creation of unauthorized Media Library entries. The issue is addressed in versions following 3.7.7.

Affected products

StellarWP Kadence Blocks — Page Builder Toolkit for Gutenberg Editor up to, including 3.7.7

Timeline

2026-07-01: advisory: NVD publication date

References

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