Cross-site scripting in CozyThemes Cozy Blocks – Page Builder for Gutenberg Editor & FSE…
Priority LOW 29CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The Cozy Blocks – Page Builder for Gutenberg Editor & FSE with 600+ Patterns, 58 Blocks & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'postMeta.font.size' Block Attribute in all versions up to, and including, 2.2.11 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00435 37th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| CozyThemes | Cozy Blocks – Page Builder for Gutenberg Editor & FSE with 600+ Patterns, 58 Blocks & Templates | up to 2.2.11 | — | No fix listed | CNA |
- Cozy Blocks – Page Builder for Gutenberg Editor & FSE with 600+ Patterns, 58 Blocks & Templates VendorCozyThemes Affected up to 2.2.11 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-15393
- 2026-10-03 Alias added: GHSA-6mvh-2gf4-h428
References
Other 16
- https://www.wordfence.com/threat-intel/vulnerabilities/id/e93de7ae-c3a8-4536-9c07-e64d7746e05f?source=cve
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.10/includes/Helpers/class-block-render.php#L512
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/Helpers/class-block-render.php#L512
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/Helpers/class-block-render.php#L513
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/Helpers/class-block-render.php#L531
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/Helpers/class-block-render.php#L532
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/Helpers/class-block-render.php#L550
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/Helpers/class-block-render.php#L551
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/blocks/categorized-post-tabs/render.php#L1
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.10/includes/Helpers/class-block-render.php#L513
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.10/includes/Helpers/class-block-render.php#L531
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.10/includes/Helpers/class-block-render.php#L532
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.10/includes/Helpers/class-block-render.php#L550
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.10/includes/Helpers/class-block-render.php#L551
- https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.10/blocks/categorized-post-tabs/render.php#L1
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3619461%40cozy-addons&new=3619461%40cozy-addons
More CozyThemes vulnerabilities
- TI-2026-79252 Local file inclusion in WordPress Rootblox plugin CVSS 3.1CRITICAL 9.8
- TI-2024-29569 WordPress FotaWP theme <= 1.4.1 - Broken Access Control vulnerability CVSS 3.1CRITICAL 9.8
- TI-2024-29568 WordPress Blockbooster theme <= 1.0.10 - Broken Access Control vulnerability CVSS 3.1CRITICAL 9.8
- TI-2024-29563 WordPress ReviveNews theme <= 1.0.2 - Broken Access Control vulnerability CVSS 3.1CRITICAL 9.8
- TI-2024-28993 WordPress Hello Agency theme <= 1.0.5 - Broken Access Control vulnerability CVSS 3.1CRITICAL 9.8
- TI-2026-67821 Authorization bypass in WordPress Cozy Blocks plugin CVSS 4.0MEDIUM 6.9
Sources
- CVE-2026-15393 · CVE Program
- CVE-2026-15393 · NVD
- FIRST EPSS
- GHSA-6mvh-2gf4-h428 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences