CVE-2025-62912 is a Stored Cross-Site Scripting (XSS) vulnerability identified in SiteGround Email Marketing software, affecting versions up to and including 1.7.1. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, which allows an attacker to inject malicious JavaScript code that is stored persistently within the application. When other users or administrators view the affected pages, the malicious script executes in their browsers within the context of the vulnerable site. This can lead to unauthorized actions such as session hijacking, theft of sensitive information, or manipulation of displayed content. The CVSS 3.1 base score is 5.4, reflecting a medium severity level. The vector indicates network attack vector (AV:N), low attack complexity (AC:L), requiring privileges (PR:L), user interaction (UI:R), scope changed (S:C), and limited confidentiality and integrity impacts (C:L/I:L), with no impact on availability (A:N). Exploitation requires an authenticated user with at least limited privileges and some user interaction, which reduces the ease of exploitation but does not eliminate risk. No public exploits or active exploitation in the wild have been reported as of the publication date. The vulnerability is particularly relevant for organizations relying on SiteGround Email Marketing for their digital campaigns, as attackers could leverage this flaw to compromise user sessions or inject malicious content into marketing communications.

For European organizations, this vulnerability poses a risk primarily to the confidentiality and integrity of data handled within the SiteGround Email Marketing platform. Attackers exploiting this flaw could hijack user sessions, steal sensitive marketing data, or manipulate email marketing content, potentially damaging brand reputation and customer trust. Since the vulnerability requires some level of authentication and user interaction, the risk is somewhat contained but still significant for organizations with many users or administrators accessing the platform. The impact on availability is negligible, but the potential for data leakage or unauthorized actions could lead to regulatory compliance issues under GDPR, especially if personal data is exposed. Organizations heavily reliant on email marketing for customer engagement and lead generation may experience operational disruptions or reputational harm if this vulnerability is exploited.

1. Apply official patches or updates from SiteGround as soon as they become available to address CVE-2025-62912. 2. Until patches are released, implement strict input validation and output encoding on all user-supplied data within the SiteGround Email Marketing environment to prevent script injection. 3. Restrict user privileges to the minimum necessary, limiting the number of users who can input or manage content that is rendered in web pages. 4. Employ Content Security Policy (CSP) headers to reduce the impact of potential XSS attacks by restricting the execution of unauthorized scripts. 5. Conduct regular security audits and penetration testing focused on web application security to detect similar vulnerabilities early. 6. Educate users and administrators about the risks of XSS and the importance of cautious interaction with links or content within the platform. 7. Monitor logs and user activity for unusual behavior that could indicate exploitation attempts.