CVE-2025-22662 identifies a stored cross-site scripting (XSS) vulnerability in the SendPulse Email Marketing Newsletter plugin, specifically in versions up to and including 2.1.5. The vulnerability is caused by improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be stored persistently on the server. When other users or administrators view the affected pages, the malicious scripts execute in their browsers under the context of the vulnerable site. This can lead to a range of attacks such as session hijacking, theft of sensitive information, unauthorized actions performed on behalf of users, and potential malware distribution. Stored XSS is particularly dangerous because the payload remains on the server and can affect multiple users over time. Although no public exploits are currently known, the vulnerability is publicly disclosed and thus may attract attackers. The SendPulse Email Marketing Newsletter plugin is widely used by organizations for managing email campaigns, making this vulnerability a significant risk for many websites. The lack of a CVSS score necessitates an assessment based on the vulnerability's characteristics: it does not require authentication to exploit, does not need user interaction beyond visiting a compromised page, and affects confidentiality, integrity, and potentially availability indirectly. The vulnerability was reserved in January 2025 and published in February 2025, indicating recent discovery and disclosure.

The impact of CVE-2025-22662 on organizations worldwide can be substantial. Exploitation of stored XSS in a widely used email marketing plugin can lead to unauthorized access to user sessions, theft of credentials, and unauthorized actions within the affected web application. This can result in data breaches, loss of customer trust, and potential regulatory penalties, especially for organizations handling sensitive customer data. Attackers could also use the vulnerability to deliver malware or phishing content to users, amplifying the damage. Since email marketing platforms often have access to large user bases and sensitive marketing data, compromise could affect both the organization and its customers. Furthermore, the persistent nature of stored XSS means that the malicious payload can impact multiple users over time, increasing the scope of damage. Organizations relying on SendPulse Email Marketing Newsletter for campaign management or customer engagement are at risk of service disruption and reputational harm if this vulnerability is exploited.

To mitigate CVE-2025-22662, organizations should implement a multi-layered approach: 1) Apply any official patches or updates from SendPulse as soon as they become available to address the vulnerability directly. 2) Implement strict input validation on all user-supplied data to ensure that malicious scripts cannot be injected. 3) Use proper output encoding/escaping techniques when rendering data in web pages to neutralize any potentially harmful content. 4) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 5) Regularly audit and monitor web application logs for suspicious activities that may indicate exploitation attempts. 6) Educate administrators and users about the risks of XSS and encourage cautious behavior when interacting with email marketing content. 7) If patching is delayed, consider disabling or restricting the vulnerable plugin functionality temporarily to reduce exposure. 8) Conduct penetration testing and vulnerability scanning focused on XSS to detect similar issues proactively. These measures combined will reduce the risk of exploitation and limit potential damage.