CVE-2025-62943 identifies a Stored Cross-Site Scripting (XSS) vulnerability in the WordPress plugin 'Next Page, Not Next Post' developed by Matt McInvale. This vulnerability exists due to improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be stored and later executed in the browsers of users who view the affected pages. The affected versions include all releases up to and including 0.3.0. The vulnerability requires an attacker to have low privileges (PR:L) and user interaction (UI:R) to trigger the exploit, but no authentication beyond low privileges is needed. The CVSS 3.1 base score is 5.4, indicating a medium severity level, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), and scope change (S:C), meaning the vulnerability can affect resources beyond the initially compromised component. The impact affects confidentiality and integrity partially (C:L/I:L) but does not affect availability (A:N). Stored XSS can lead to session hijacking, defacement, or redirection to malicious sites, potentially compromising user data or site integrity. No patches or known exploits are currently reported, but the vulnerability is publicly disclosed and should be addressed promptly. The plugin is used in WordPress environments, which are widely deployed for content management and blogging.

For European organizations, this vulnerability poses risks primarily to websites using the 'Next Page, Not Next Post' plugin on WordPress platforms. Exploitation could allow attackers to inject malicious scripts that execute in the browsers of site visitors or administrators, potentially leading to theft of session cookies, unauthorized actions on behalf of users, or defacement of web content. This can damage organizational reputation, lead to data breaches involving user information, and undermine trust in digital services. Since the vulnerability requires low privileges and user interaction, attackers could leverage social engineering to increase success rates. The impact is more pronounced for organizations with high web traffic, user accounts, or sensitive data accessible via the affected plugin. Additionally, compromised sites could be used as vectors for further attacks or malware distribution, increasing the overall risk landscape. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as public disclosure may prompt attackers to develop exploits.

Organizations should monitor for official patches or updates from the plugin developer and apply them immediately once available. In the absence of a patch, administrators should consider disabling or removing the 'Next Page, Not Next Post' plugin to eliminate exposure. Implement strict input validation and output encoding on all user-supplied data to prevent script injection. Employ Content Security Policies (CSP) to restrict the execution of unauthorized scripts on web pages. Conduct regular security audits and vulnerability scans focused on WordPress plugins and themes. Educate users and administrators about the risks of social engineering and the importance of cautious interaction with web content. Use web application firewalls (WAFs) configured to detect and block XSS payloads targeting the affected plugin. Maintain up-to-date backups to enable rapid recovery in case of compromise. Finally, monitor web server logs and user reports for signs of exploitation attempts or unusual activity related to the plugin.