CVE-2025-62991 is a stored Cross-site Scripting (XSS) vulnerability classified under CWE-79, found in the ThinkUpThemes Minamaze WordPress theme versions up to 1.10.1. The vulnerability stems from improper neutralization of input during web page generation, meaning that user-supplied data is not correctly sanitized or escaped before being embedded into web pages. This flaw allows attackers with at least low-level privileges (PR:L) to inject malicious JavaScript code that is stored persistently on the website, for example in comments or other input fields. When other users or administrators visit the affected pages, the malicious script executes in their browsers, potentially leading to session hijacking, credential theft, defacement, or further exploitation of the site. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L) indicates that the attack can be launched remotely over the network with low attack complexity, requires some user interaction, and privileges, and affects confidentiality, integrity, and availability with a scope change (S:C). Although no known exploits are currently reported in the wild, the vulnerability poses a significant risk due to the widespread use of WordPress themes and the persistent nature of stored XSS. The lack of an official patch at the time of publication increases the urgency for mitigation through alternative means. Organizations using Minamaze should monitor for updates and consider temporary mitigations such as input validation and CSP enforcement.

For European organizations, this vulnerability can lead to unauthorized access to sensitive information, session hijacking, and potential defacement or disruption of web services. Since many European businesses rely on WordPress for their websites, especially in sectors like e-commerce, media, and public services, exploitation could damage reputation, lead to data breaches under GDPR, and cause operational downtime. The stored nature of the XSS means that malicious payloads can persist and affect multiple users over time, increasing the risk of widespread compromise. Additionally, the vulnerability could be leveraged as a foothold for further attacks within corporate networks if administrative users are targeted. The medium CVSS score reflects a moderate but tangible risk that requires proactive management to avoid regulatory and financial consequences.

1. Monitor ThinkUpThemes official channels for patches addressing CVE-2025-62991 and apply them promptly once available. 2. Implement strict input validation and output encoding on all user-supplied data fields within the Minamaze theme or any customizations to prevent injection of malicious scripts. 3. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS payloads. 4. Limit user privileges to the minimum necessary, especially for content contributors, to reduce the risk of malicious input. 5. Conduct regular security audits and penetration testing focused on web application vulnerabilities, including XSS. 6. Educate site administrators and users about the risks of clicking on suspicious links or interacting with untrusted content. 7. Consider temporary disabling or replacing the Minamaze theme if patches are delayed and risk is deemed unacceptable.