CVE-2023-40555 json
WordPress Flatsome Theme <= 3.17.5 is vulnerable to PHP Object Injection
published 2023-12-20 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-45126
- cvss
- 8.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
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.
Patch / fix
- UX-themes Flatsome | Multi-Purpose Responsive WooCommerce Theme 3.17.6
Exploit prediction
0.60% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- UX-themes Flatsome | Multi-Purpose Responsive WooCommerce Theme
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
- Technology feeds
References
-
patchstack.com
/database/vulnerability/flatsome/wordpress-flatsome-theme-3-17-5-unauthenticated-php-object-injection-vulnerab
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2023-40555
- NVD CVE-2023-40555
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.