CVE-2025-49389: 
WordPress vulnerability analysis and mitigation

The Notice Bar WordPress plugin contains a Stored Cross-Site Scripting (XSS) vulnerability, identified as CVE-2025-49389, affecting versions up to and including 3.1.3. The vulnerability was discovered by Nabil Irawan and publicly disclosed on August 20, 2025. This security issue affects the WEN Solutions Notice Bar plugin, which is a WordPress plugin used for displaying notification bars (Patchstack).

The vulnerability is classified as a Stored Cross-Site Scripting (XSS) issue (CWE-79) due to insufficient input sanitization and output escaping. It has received a CVSS v3.1 base score of 6.5 (Medium), with the following vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L. The vulnerability requires authenticated access with contributor-level privileges or higher to exploit (Rapid7).

If exploited, this vulnerability allows authenticated attackers to inject malicious scripts, including redirects, advertisements, and other HTML payloads into the website. These injected scripts will execute when visitors access the affected pages. The impact affects confidentiality, integrity, and availability at a low level, but with changed scope, potentially affecting other parts of the application (Patchstack).

The vulnerability has been patched in version 3.1.4 of the Notice Bar plugin. Users are advised to update to version 3.1.4 or later to remove the vulnerability. The security issue is considered to have a low severity impact and is unlikely to be exploited, but updating is still recommended as a security best practice (Patchstack).