CVE-2025-14056 is a stored Cross-Site Scripting (XSS) vulnerability identified in the Custom Post Type UI plugin developed by webdevstudios for WordPress. The flaw exists in all versions up to and including 1.18.1 and is due to improper neutralization of input during web page generation, specifically insufficient sanitization and output escaping of the 'label' parameter used during the import of custom post types. An attacker with Administrator-level privileges can exploit this vulnerability by injecting arbitrary JavaScript code into the 'label' field during the import process. This malicious script is then stored persistently and executed whenever any user accesses the Tools → Get Code page within the WordPress admin interface. The vulnerability is classified under CWE-79, indicating a classic stored XSS issue. The CVSS v3.1 base score is 4.4, reflecting a medium severity level. The vector indicates that the attack can be performed remotely over the network (AV:N), requires high attack complexity (AC:H), needs privileges at the administrator level (PR:H), and does not require user interaction (UI:N). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. The impact on confidentiality and integrity is low (C:L/I:L), with no impact on availability (A:N). No public exploits have been observed in the wild to date. The vulnerability highlights a risk where trusted administrators could unintentionally or maliciously inject scripts that compromise other users' sessions or site integrity when accessing the affected page. The lack of patch links suggests that a fix may not yet be publicly available, emphasizing the need for immediate mitigation steps.

The primary impact of CVE-2025-14056 is the potential for stored XSS attacks within WordPress sites using the vulnerable Custom Post Type UI plugin. An attacker with administrator privileges can inject malicious scripts that execute in the context of other administrators or users accessing the Tools → Get Code page. This can lead to session hijacking, privilege escalation, or unauthorized actions performed on behalf of the victim user. Although the confidentiality and integrity impacts are rated low, the vulnerability can facilitate further attacks by compromising administrative accounts or injecting persistent malicious content. The availability of the site is not directly affected. Organizations relying on this plugin risk unauthorized access and manipulation of their WordPress administrative interfaces, potentially leading to broader compromise of the website or connected systems. Since exploitation requires administrator access, the threat is somewhat limited to insider threats or attackers who have already breached lower-level accounts. However, the stored nature of the XSS increases the risk of persistent compromise and lateral movement within the WordPress environment. The absence of known exploits in the wild reduces immediate risk but does not eliminate the threat, especially as attackers often weaponize such vulnerabilities once disclosed. The vulnerability could affect a wide range of organizations globally, particularly those with large WordPress deployments and multiple administrators, including enterprises, media companies, and e-commerce sites.

To mitigate CVE-2025-14056, organizations should first check for and apply any official patches or updates released by webdevstudios for the Custom Post Type UI plugin as soon as they become available. In the absence of a patch, administrators should restrict plugin usage to trusted personnel only and minimize the number of users with Administrator privileges to reduce the risk of malicious input. Implement strict input validation and output encoding for the 'label' parameter during custom post type imports, either by applying custom filters or using security plugins that sanitize inputs. Regularly audit and monitor the Tools → Get Code page and other administrative pages for suspicious scripts or unauthorized changes. Employ Web Application Firewalls (WAFs) with rules designed to detect and block stored XSS payloads targeting WordPress admin pages. Additionally, consider disabling or limiting access to the import functionality if it is not essential. Educate administrators on the risks of importing untrusted content and enforce strong authentication mechanisms such as multi-factor authentication to reduce the likelihood of account compromise. Finally, maintain regular backups of the WordPress site to enable quick recovery if exploitation occurs.