CVE-2025-67533 is a stored Cross-site Scripting (XSS) vulnerability identified in the Themify Portfolio Post WordPress plugin, affecting versions up to and including 1.3.0. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be stored persistently within the plugin's data structures. When a victim visits a compromised page, the malicious script executes in their browser context, potentially leading to session hijacking, credential theft, defacement, or distribution of malware. The vulnerability does not require user interaction beyond page visit and may not require authentication, increasing the attack surface. Although no public exploits are currently known, the nature of stored XSS makes it a critical concern for websites relying on this plugin. The plugin is commonly used in WordPress environments to showcase portfolio items, making it a target for attackers aiming to compromise websites with high traffic or valuable user data. The lack of a CVSS score indicates the need for a manual severity assessment. The vulnerability was published on December 9, 2025, by Patchstack, with no patch links currently available, indicating that users should monitor for updates or apply interim mitigations.

For European organizations, this vulnerability can lead to significant security breaches, especially for those relying on WordPress sites with the Themify Portfolio Post plugin. Successful exploitation can compromise user sessions, leading to unauthorized access to sensitive information and potential lateral movement within corporate networks. The stored XSS can also be leveraged to deliver malware or phishing payloads to site visitors, damaging organizational reputation and trust. Sectors such as e-commerce, media, and professional services that maintain public-facing portfolios are particularly vulnerable. Additionally, regulatory implications under GDPR arise if personal data is compromised through such attacks, potentially resulting in fines and legal consequences. The ease of exploitation without authentication increases the risk, especially for organizations with less mature web security practices. The absence of a patch at the time of disclosure necessitates immediate attention to reduce exposure.

European organizations should immediately audit their WordPress environments to identify installations of the Themify Portfolio Post plugin and verify the version in use. Until an official patch is released, administrators should consider disabling or removing the plugin if feasible. Implementing Web Application Firewalls (WAFs) with custom rules to detect and block malicious script payloads targeting this plugin can provide interim protection. Applying strict Content Security Policies (CSP) to restrict script execution sources can mitigate the impact of XSS attacks. Additionally, sanitizing and validating all user inputs related to portfolio posts through custom code or third-party security plugins can reduce risk. Regularly monitoring website logs for suspicious activity and educating site administrators on secure plugin management are also critical. Once a patch is available, prompt updating is essential. Organizations should also review and strengthen incident response plans to quickly address any exploitation attempts.