CVE-2025-39540: 
WordPress vulnerability analysis and mitigation

A Cross-site Scripting (XSS) vulnerability has been identified in Rhys Wynne WP Flipclock plugin versions through 1.9.1. The vulnerability was discovered on October 18, 2024, and publicly disclosed on April 16, 2025, with the identifier CVE-2025-39540. This DOM-Based XSS vulnerability affects the WordPress plugin WP Flipclock and requires contributor-level privileges to exploit (Patchstack).

The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation) with a CVSS v3.1 Base Score of 6.5 (Medium). The attack vector is network-based (AV:N), with low attack complexity (AC:L), requiring low privileges (PR:L), and user interaction (UI:R). The scope is changed (S:C) with low impacts on confidentiality, integrity, and availability (C:L/I:L/A:L) (NVD).

The vulnerability could allow malicious actors to inject malicious scripts, including redirects, advertisements, and other HTML payloads into the website. These injected scripts would be executed when guests visit the affected site (Patchstack).

As of the disclosure date, no official fix is available for this vulnerability. Given the low severity impact, virtual patching is deemed unnecessary (Patchstack).