Is CVE-2023-40555 actively exploited?

No active exploitation of CVE-2023-40555 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-40555 be exploited remotely?

Yes. CVE-2023-40555 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-40555?

CVE-2023-40555 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-40555

CRITICAL

CVE-2023-40555

CWE-502Published: December 20, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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.

NVD Source

Risk Analysis

The Flatsome theme for WooCommerce contains a deserialization of untrusted data vulnerability. This critical flaw enables remote code execution by unauthenticated attackers, resulting in a maximum CVSS score of 9.8.

There is no known public exploit, and the vulnerability is not in the CISA KEV. It is remotely exploitable with low attack complexity.

Recommended Action

Update the Flatsome theme to the latest version provided by the vendor. Avoid using untrusted data sources in theme configurations.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-40555 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.