CVE-2025-62912 is a stored Cross-site Scripting (XSS) vulnerability identified in SiteGround Email Marketing software versions up to and including 1.7.1. The root cause is improper neutralization of input during web page generation, which allows malicious input to be stored and later rendered in a way that executes attacker-controlled scripts in the context of a victim's browser. This vulnerability requires an attacker to have at least limited privileges (PR:L) and user interaction (UI:R) to be exploited, such as tricking a user into clicking a crafted link or viewing a malicious email marketing page. The CVSS vector indicates 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 but not availability, allowing potential theft of session tokens, user credentials, or unauthorized actions within the application. No patches or known exploits are currently reported, but the vulnerability is publicly disclosed and should be addressed promptly. The stored nature of the XSS makes it particularly dangerous as malicious scripts can persist and affect multiple users over time. The vulnerability affects organizations using SiteGround Email Marketing for their campaigns, potentially exposing their users and internal systems to targeted attacks.

For European organizations, this vulnerability poses a risk primarily to the confidentiality and integrity of user data and internal communications managed via SiteGround Email Marketing. Attackers exploiting this stored XSS could hijack user sessions, steal sensitive information, or manipulate marketing content to distribute malware or phishing links. This could lead to reputational damage, regulatory non-compliance (e.g., GDPR violations due to data exposure), and financial losses. Since the vulnerability requires some level of privilege and user interaction, insider threats or social engineering attacks could amplify its impact. The scope change in the CVSS vector suggests that exploitation could affect other components or users beyond the initially targeted system, increasing the potential damage. Given the widespread use of email marketing in Europe, especially in sectors like retail, finance, and technology, the vulnerability could disrupt business operations and customer trust if exploited.

European organizations using SiteGround Email Marketing should immediately monitor for updates or patches from SiteGround and apply them as soon as they become available. In the interim, implement strict input validation and sanitization on all user-supplied data within the email marketing platform to prevent malicious script injection. Deploy Content Security Policies (CSP) to restrict the execution of unauthorized scripts in browsers. Limit user privileges within the platform to the minimum necessary to reduce the attack surface. Conduct user awareness training to recognize phishing attempts or suspicious links that could trigger the stored XSS. Employ web application firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting the SiteGround Email Marketing interface. Regularly audit logs and monitor for unusual activities indicative of exploitation attempts. Finally, consider isolating the email marketing platform from critical internal systems to contain potential breaches.