Cross-site scripting in extendthemes Kubio AI Page Builder
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 Kubio AI Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via kubio/copyright Block Content in all versions up to, and including, 2.8.4 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. This bypasses both the WordPress core kses-on-save filter and the plugin's own wp_kses_post() call, because entity-encoded script tags are treated as inert text by kses but are decoded into live HTML by the subsequent html_entity_decode() call in CopyrightBlock::render_template().
Why it matters now
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 |
|---|---|---|---|---|---|
| extendthemes | Kubio AI Page Builder | up to 2.8.4 | — | No fix listed | CNA |
- Kubio AI Page Builder Vendorextendthemes Affected up to 2.8.4 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-14472
- 2026-10-03 Alias added: GHSA-vvvj-jr6q-4x2q
References
Other 5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/89392f97-58c5-48db-b835-013ef493ca5e?source=cve
- https://plugins.trac.wordpress.org/browser/kubio/tags/2.8.2/build/block-library/blocks/copyright/index.php#L38
- https://plugins.trac.wordpress.org/browser/kubio/tags/2.8.2/build/block-library/blocks/copyright/index.php#L22
- https://plugins.trac.wordpress.org/browser/kubio/tags/2.8.2/lib/src/Core/Blocks/BlockBase.php#L413
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3616537%40kubio&new=3616537%40kubio
More extendthemes vulnerabilities
- TI-2025-02014 Kubio AI Page Builder <= 2.5.1 - Unauthenticated Local File Inclusion CVSS 3.1CRITICAL 9.8
- TI-2022-04358 Materialis Companion < 1.3.40 - Contributor+ Stored XSS via Shortcode CVSS 3.1MEDIUM 5.4
- TI-2022-04096 Mesmerize Companion < 1.6.135 - Contributor+ Stored XSS CVSS 3.1MEDIUM 5.4
- TI-2019-15245 Mesmerize <= 1.6.89 & Materialis <= 1.0.172 - Authenticated Arbitrary Options Update CVSS 3.1HIGH 8.8
- TI-2026-54440 WordPress Lead Generation Contact Widget & AI Chatbot: Chat Button, Phone Call, Telegram… CVSS 3.1HIGH 7.5
- TI-2024-22269 WordPress Teluro theme <= 1.0.31 - Cross Site Request Forgery (CSRF) vulnerability CVSS 3.1HIGH 8.8
Sources
- CVE-2026-14472 · CVE Program
- CVE-2026-14472 · NVD
- FIRST EPSS
- GHSA-vvvj-jr6q-4x2q · 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