Kadence Blocks <= 3.7.12 - Authenticated (Author+) Stored Cross-Site Scripting via Block Font Family Attribute (stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.21 % · percentile 11 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Wordfence
- NVD status
- Deferred
Description
The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Block Font Family Attribute in all versions up to, and including, 3.7.12 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This encoding bypass is only triggered when the "Load Google Fonts Locally" site option (kadence_blocks_font_settings['load_fonts_local']) is enabled, which is not the default configuration.
Weaknesses (CWE)
- CWE-79 — Improper Neutralization of Input During Web Page Generation
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c5c83ab8-91d4-488e-903d-2a4b7f0dfe7d?source=cve
- https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.12/includes/class-kadence-blocks-frontend.php#L379
- https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.12/includes/class-kadence-blocks-frontend.php#L377
- https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.12/includes/class-kadence-blocks-google-fonts.php#L152
- https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.12/includes/class-kadence-blocks-css.php#L2516
- https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.12/includes/class-kadence-blocks-css.php#L858
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3731453%40kadence-blocks&new=3731453%40kadence-blocks
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | Wordfence |
| CVSS 3.1 | MEDIUM 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | NVD · security@wordfence.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-96107
- GCVE · GCVE-0-2026-104762
Affected products
| Product | Versions |
|---|---|
| stellarwp · Kadence Blocks — Page Builder Toolkit for Gutenberg Editor | affected 0 ≤ 3.7.12 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |