Cross-site scripting in livecomposer Live Composer – Free WordPress Website 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 Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via dslc_module_projects_output Shortcode in all versions up to, and including, 2.1.19 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. WordPress's shortcode-aware kses handling preserves the serialized shortcode body as a placeholder before content filtering runs, allowing attacker-controlled values such as view_all_link, main_heading_link_title, main_filter_title_all, and button_text to reach render-time sinks entirely unescaped.
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 |
|---|---|---|---|---|---|
| livecomposer | Live Composer – Free WordPress Website Builder | up to 2.1.19 | — | No fix listed | CNA |
- Live Composer – Free WordPress Website Builder Vendorlivecomposer Affected up to 2.1.19 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-16788
- 2026-10-03 Alias added: GHSA-mxp4-75jf-xp7h
References
Other 7
- https://www.wordfence.com/threat-intel/vulnerabilities/id/a8ae901a-c32a-43d8-b23b-088e695a5823?source=cve
- https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/projects/module.php#L6278
- https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/projects/module.php#L6025
- https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/projects/module.php#L6312
- https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/projects/module.php#L6563
- https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/projects/module.php#L6743
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3662813%40live-composer-page-builder&new=3662813%40live-composer-page-builder
More livecomposer vulnerabilities
- TI-2026-13779 Live Composer <= 2.1.18 - Authenticated (Contributor+) PHP Object Injection via Shortcode CVSS 3.1HIGH 8.8
- TI-2025-12857 Deserialization of untrusted data in livecomposer Live Composer – Free WordPress Website… CVSS 3.1HIGH 7.5
- TI-2026-13966 Cross-site scripting in livecomposer Live Composer – Free WordPress Website Builder CVSS 3.1MEDIUM 6.4
- TI-2026-11211 Live Composer <= 2.1.19 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'custom_id' Shortcode Attribute CVSS 3.1MEDIUM 6.4
- TI-2026-13972 Live Composer <= 2.1.19 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'dslc_custom_field' Shortcode CVSS 3.1MEDIUM 6.4
- TI-2026-13971 Cross-site scripting in livecomposer Live Composer – Free WordPress Website Builder CVSS 3.1MEDIUM 6.4
Sources
- CVE-2026-16788 · CVE Program
- CVE-2026-16788 · NVD
- FIRST EPSS
- GHSA-mxp4-75jf-xp7h · 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