CVE-2025-23893 identifies a DOM-based Cross-site Scripting (XSS) vulnerability in the Manny Costales GMap Shortcode plugin, which is used to embed Google Maps into web pages, primarily within WordPress sites. The vulnerability stems from improper neutralization of input during web page generation, allowing malicious scripts to be injected into the Document Object Model (DOM) without adequate sanitization. This type of XSS occurs on the client side, meaning the malicious payload is executed in the victim's browser when they interact with a crafted URL or manipulated page content. The affected versions include all releases up to and including version 2.0. Since the vulnerability is DOM-based, it does not necessarily require server-side code changes to be exploited, but rather relies on how the plugin processes and injects user-controllable data into the page. No authentication is required for exploitation, but user interaction is necessary to trigger the malicious script execution. Although no active exploits have been reported, the vulnerability poses a significant risk as attackers could steal session cookies, perform actions on behalf of the user, or redirect users to malicious sites. The lack of an official patch at the time of disclosure means that users must rely on interim mitigations. The vulnerability was published on January 16, 2025, and is tracked by Patchstack, but no CVSS score has been assigned yet.

The primary impact of this DOM-based XSS vulnerability is on the confidentiality and integrity of user data within affected websites. Attackers exploiting this flaw can execute arbitrary JavaScript in the context of the victim's browser, potentially leading to session hijacking, theft of sensitive information such as cookies or credentials, unauthorized actions performed on behalf of the user, and redirection to malicious websites. This can erode user trust, damage brand reputation, and expose organizations to regulatory penalties if personal data is compromised. The availability impact is generally low but could be indirectly affected if attackers use the vulnerability to deploy further attacks such as malware distribution or defacement. Since the vulnerability affects a widely used WordPress plugin, the scope includes numerous websites globally, especially those embedding Google Maps via this shortcode. Organizations relying on this plugin for location services on their websites are at risk, particularly if they have not implemented additional security controls or input validation. The ease of exploitation without authentication increases the threat level, making it attractive for attackers targeting web users and administrators.

1. Apply official patches or updates from the Manny Costales GMap Shortcode plugin as soon as they become available to address the vulnerability directly. 2. Until patches are released, implement strict input validation and sanitization on all user-supplied data that the plugin processes, especially parameters used in map embedding or shortcode attributes. 3. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the risk of XSS exploitation. 4. Use security plugins or web application firewalls (WAFs) that can detect and block common XSS attack patterns targeting WordPress sites. 5. Educate website administrators and developers about safe coding practices and the risks of DOM-based XSS to prevent similar vulnerabilities in custom code. 6. Monitor web traffic and logs for unusual activity or attempts to exploit this vulnerability, enabling rapid incident response. 7. Encourage users to keep their browsers updated and consider browser-based XSS protection features as an additional defense layer.