CVE-2025-47622 is a medium-severity vulnerability classified under CWE-79, which corresponds to Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting (XSS). This vulnerability affects the 'Email Notification on Login' feature of the 'apasionados' product up to version 1.6.1. The flaw allows an attacker to inject malicious scripts that are stored persistently (Stored XSS) and executed when a user views the affected web page. The vulnerability arises because user input is not properly sanitized or encoded before being included in the HTML output, enabling attackers to execute arbitrary JavaScript in the context of the victim's browser. The CVSS v3.1 score is 5.9 (medium), with vector AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L, indicating that the attack can be performed remotely over the network with low attack complexity but requires high privileges and user interaction. The scope is changed (S:C), meaning the vulnerability affects resources beyond the security scope of the vulnerable component. The impact includes limited confidentiality, integrity, and availability loss, such as session hijacking, defacement, or unauthorized actions performed on behalf of the user. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability was published on May 7, 2025, and is tracked by Patchstack and CISA enrichment. Stored XSS vulnerabilities are particularly dangerous because they can affect multiple users and persist over time, increasing the attack surface and potential damage.

For European organizations using the 'apasionados Email Notification on Login' product, this vulnerability could lead to significant security risks. Attackers exploiting this Stored XSS flaw could hijack user sessions, steal sensitive information, or perform unauthorized actions within the affected application. This could result in data breaches, loss of user trust, and regulatory non-compliance, especially under GDPR requirements for protecting personal data. The requirement for high privileges to exploit reduces the risk somewhat but does not eliminate it, as insiders or attackers who have gained elevated access could leverage this vulnerability to escalate attacks. Additionally, the need for user interaction means phishing or social engineering could be used to trigger the exploit. The scope change indicates that the attack could impact other components or users beyond the initially compromised context, potentially leading to broader compromise within an organization's infrastructure. Given the widespread regulatory scrutiny and the critical nature of email notification systems in authentication workflows, exploitation could disrupt business operations and damage reputations.

European organizations should implement the following specific mitigation steps: 1) Immediately audit and review the 'Email Notification on Login' feature for any unescaped or unsanitized user inputs, especially those that are stored and rendered in web pages. 2) Apply strict input validation and output encoding using context-appropriate escaping libraries to neutralize any injected scripts. 3) Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 4) Enforce the principle of least privilege to limit the number of users with high privileges required to exploit this vulnerability. 5) Conduct user awareness training to reduce the risk of social engineering attacks that could trigger the vulnerability. 6) Monitor logs and user activity for unusual behavior indicative of XSS exploitation attempts. 7) Stay updated with the vendor for patches or updates addressing this vulnerability and prioritize their deployment once available. 8) Consider deploying Web Application Firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting this specific feature. These steps go beyond generic advice by focusing on the particular context of stored XSS in an email notification login feature and the privilege requirements involved.