CVE-2025-64558 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. Stored XSS occurs when malicious scripts are permanently stored on a target server, such as within form fields, and later executed in the browsers of users who access the affected pages. In this case, a low-privileged attacker can inject JavaScript code into vulnerable input fields that do not properly sanitize or encode user-supplied data. When other users visit the compromised page, the injected script executes in their browsers with the privileges of the victim user, potentially leading to session hijacking, credential theft, or unauthorized actions within the application context. The vulnerability requires the attacker to have some level of privilege to submit malicious input and requires user interaction (visiting the infected page) to trigger the exploit. The CVSS 3.1 base score of 5.4 reflects a medium severity, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), low privileges required (PR:L), user interaction required (UI:R), scope changed (S:C), and limited impact on confidentiality and integrity (C:L/I:L) with no impact on availability (A:N). No patches or exploit code are currently publicly available, but the vulnerability is publicly disclosed and should be considered a risk for organizations using affected AEM versions. Adobe Experience Manager is widely used by enterprises and public sector organizations for content management and digital experience delivery, making this vulnerability relevant for high-value targets. The vulnerability could be leveraged in targeted phishing or social engineering campaigns to execute malicious scripts in trusted environments.

For European organizations, the impact of CVE-2025-64558 can be significant, especially for those relying on Adobe Experience Manager for their web content management and digital services. Exploitation could lead to unauthorized disclosure of sensitive information, such as session tokens or user credentials, enabling attackers to impersonate legitimate users or escalate privileges. This can result in data breaches, unauthorized modifications to web content, defacement, or redirection to malicious sites. Public sector entities and enterprises with high-value digital assets are particularly at risk, as successful exploitation could undermine trust and compliance with data protection regulations like GDPR. The vulnerability's requirement for user interaction and low privileges means attackers could exploit it through social engineering or by compromising low-level user accounts, increasing the attack surface. Although no availability impact is expected, the confidentiality and integrity risks can disrupt business operations and damage reputations.

1. Monitor Adobe's official channels for patches addressing CVE-2025-64558 and apply them promptly once released. 2. Implement strict input validation and output encoding on all form fields within Adobe Experience Manager to prevent injection of malicious scripts. 3. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers, limiting the impact of potential XSS payloads. 4. Conduct regular security audits and penetration testing focused on web application vulnerabilities, including stored XSS. 5. Educate users and administrators about the risks of clicking on suspicious links or submitting untrusted content. 6. Use web application firewalls (WAFs) with rules tailored to detect and block XSS attack patterns targeting AEM. 7. Limit privileges of users who can submit content to the minimum necessary to reduce the risk of malicious input. 8. Review and harden AEM configurations to disable unnecessary features that could be exploited for injection. 9. Monitor logs and alerts for unusual activity related to form submissions and user interactions on AEM-managed sites.