Read the docs
TI-2023-21360 Aliases CVE-2023-40555GHSA-9fmf-6xvc-qw23

WordPress Flatsome Theme <= 3.17.5 is vulnerable to PHP Object Injection

Priority MEDIUM 43CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-502.

Summary

Deserialization of Untrusted Data vulnerability in UX-themes Flatsome | Multi-Purpose Responsive WooCommerce Theme.This issue affects Flatsome | Multi-Purpose Responsive WooCommerce Theme: from n/a through 3.17.5.

Why it matters now

EPSS 0.00602 49th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
UX-themesFlatsome | Multi-Purpose Responsive WooCommerce Themeup to 3.17.5—No fix listedCNA
  • Flatsome | Multi-Purpose Responsive WooCommerce Theme VendorUX-themes Affected up to 3.17.5 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:uxthemes:flatsome:*:*:*:*:*:wordpress:*:*before 3.17.6VulnerableUX-themes
  • cpe:2.3:a:uxthemes:flatsome:*:*:*:*:*:wordpress:*:* Versions before 3.17.6 Vulnerable ·UX-themes

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-40555
  2. 2026-10-03 Alias added: GHSA-9fmf-6xvc-qw23

References

Advisory 1

  • TI-2023-13456 WordPress Flatsome Theme <= 3.16.8 is vulnerable to Cross Site Scripting (XSS) CVSS 3.1HIGH 7.1
  • TI-2024-04965 Cross-site scripting in UX-themes Flatsome CVSS 3.1MEDIUM 6.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences