CVE-2025-64556 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM), a widely used enterprise content management system. The vulnerability affects versions 6.5.23 and earlier, allowing an attacker with low privileges to inject malicious JavaScript code into form fields that are stored and later rendered in the application. When legitimate users access the affected pages, the malicious script executes in their browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the user. The attack vector is network-based, with low complexity, requiring the attacker to have some level of authenticated access to submit malicious input. User interaction is necessary for the exploit to succeed, as the victim must visit the compromised page. The vulnerability impacts confidentiality and integrity but does not affect availability. The CVSS v3.1 score of 5.4 reflects these factors, categorizing the threat as medium severity. No public exploits have been reported yet, but the risk remains significant due to the widespread use of AEM in enterprise environments. The lack of available patches at the time of reporting necessitates immediate mitigation efforts to prevent exploitation. The vulnerability is classified under CWE-79, indicating improper neutralization of input leading to script injection. Given the critical role of AEM in managing digital content and customer experiences, exploitation could lead to data leakage, defacement, or further compromise of enterprise systems.

For European organizations, the impact of CVE-2025-64556 can be substantial due to the prevalent use of Adobe Experience Manager in sectors such as government, finance, retail, and media. Exploitation could lead to unauthorized disclosure of sensitive information, including session tokens and personal data, undermining user trust and violating GDPR requirements. Integrity of web content could be compromised, leading to misinformation or fraudulent activities. Although availability is not directly affected, the reputational damage and potential regulatory fines could be severe. Organizations that rely heavily on AEM for customer-facing portals or internal collaboration platforms may experience increased risk of targeted attacks, especially if attackers leverage this vulnerability as an initial foothold for further lateral movement. The medium severity rating suggests that while the vulnerability is not critical, it still poses a meaningful threat that should be addressed promptly to avoid escalation.

1. Monitor Adobe’s official channels for patches addressing CVE-2025-64556 and apply them immediately upon release. 2. Implement strict input validation on all form fields to reject or sanitize potentially malicious scripts before storage. 3. Employ robust output encoding techniques to ensure that stored data is safely rendered in the browser context. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 5. Limit user privileges to the minimum necessary to reduce the attack surface for low privileged attackers. 6. Conduct regular security audits and penetration testing focused on web application vulnerabilities, including stored XSS. 7. Educate users and administrators about the risks of XSS and encourage vigilance when interacting with web content. 8. Use web application firewalls (WAFs) configured to detect and block XSS payloads targeting AEM. 9. Review and harden AEM configurations to disable unnecessary features or components that may increase exposure. 10. Maintain comprehensive logging and monitoring to detect suspicious activities related to script injection attempts.