CVE-2025-13846 identifies a stored Cross-Site Scripting (XSS) vulnerability in the Easy Map Creator plugin for WordPress, affecting all versions up to and including 3.0.2. The vulnerability arises from improper neutralization of input during web page generation, specifically due to insufficient sanitization and output escaping of the 'width' parameter. Authenticated attackers with Contributor-level privileges or higher can exploit this flaw by injecting arbitrary JavaScript code into pages via the vulnerable parameter. Because the injected scripts are stored persistently, they execute every time a user accesses the compromised page, potentially allowing attackers to steal session cookies, perform actions on behalf of users, or deliver further malware. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N) indicates network attack vector, low attack complexity, requiring privileges but no user interaction, with a scope change and partial impact on confidentiality and integrity but no impact on availability. No patches or exploits are currently publicly available, but the vulnerability poses a significant risk in multi-user WordPress environments where contributors can add or edit content. The root cause is the lack of proper input validation and output encoding in the plugin's handling of the 'width' parameter, which should be addressed by the vendor or mitigated by site administrators.

For European organizations, this vulnerability can lead to unauthorized script execution within their WordPress sites, compromising user sessions and potentially exposing sensitive information. Organizations with collaborative content creation workflows are particularly vulnerable since the exploit requires Contributor-level access. Attackers could leverage this to perform privilege escalation, data theft, or defacement, damaging reputation and trust. The impact is heightened for public-facing websites with high traffic, as the injected scripts execute for all visitors. Although availability is not directly affected, the integrity and confidentiality breaches can lead to regulatory non-compliance under GDPR if personal data is compromised. Additionally, organizations in sectors such as government, finance, and media, which rely heavily on WordPress for content management, face increased risk. The absence of known exploits currently provides a window for proactive mitigation before widespread attacks occur.

1. Immediately update the Easy Map Creator plugin to a patched version once released by the vendor. 2. Until a patch is available, restrict Contributor-level and higher permissions to trusted users only, minimizing the risk of malicious input. 3. Implement Web Application Firewall (WAF) rules to detect and block suspicious payloads targeting the 'width' parameter. 4. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts on affected pages. 5. Conduct regular security audits and code reviews of WordPress plugins, especially those handling user input. 6. Sanitize and validate all user inputs rigorously, applying output encoding on dynamic content. 7. Monitor logs for unusual activities related to the plugin or user content modifications. 8. Educate content contributors about security best practices and the risks of injecting untrusted content. 9. Consider disabling or replacing the Easy Map Creator plugin if immediate patching is not feasible.