CVE-2025-64627 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. The vulnerability arises from insufficient sanitization of user input in certain form fields, allowing a low privileged attacker to inject malicious JavaScript code that is persistently stored on the server. When legitimate users access the affected pages containing these vulnerable fields, the malicious script executes in their browsers under the context of the trusted domain. This can lead to theft of session cookies, credentials, or other sensitive information, as well as the potential for further exploitation such as redirecting users to malicious sites or performing actions on behalf of the user. The vulnerability requires the attacker to have low privileges to submit crafted input and requires user interaction (visiting the compromised page) to trigger the payload. The CVSS 3.1 base score is 5.4, indicating a medium severity level, with vector metrics showing network attack vector, low attack complexity, low privileges required, user interaction needed, and partial impact on confidentiality and integrity but no impact on availability. No public exploits or patches have been reported at the time of publication. The vulnerability affects a widely used enterprise content management system, making it a concern for organizations relying on AEM for web content delivery and digital asset management. The stored nature of the XSS increases the risk compared to reflected XSS, as the malicious payload persists and can affect multiple users. The vulnerability's scope is limited to the web application layer and browser context, without direct system compromise. However, the potential for lateral attacks and data leakage makes it important to address promptly.

For European organizations, the impact of CVE-2025-64627 can be significant, especially for those using Adobe Experience Manager to manage public-facing websites, intranets, or digital services. Successful exploitation could lead to unauthorized disclosure of sensitive information such as session tokens, user credentials, or personal data, potentially violating GDPR and other data protection regulations. This could result in reputational damage, regulatory fines, and loss of customer trust. Additionally, attackers could leverage the XSS vulnerability to perform phishing attacks, deliver malware, or escalate privileges within the affected environment. The medium severity rating reflects that while the vulnerability does not directly compromise system availability or allow remote code execution, the confidentiality and integrity of user sessions and data are at risk. Organizations in sectors such as government, finance, healthcare, and media, which often use AEM for content management, may face higher risks due to the sensitivity of the data handled. The requirement for user interaction means that social engineering or targeted campaigns could increase the likelihood of successful exploitation. Furthermore, the persistent nature of stored XSS means that multiple users could be affected over time if the vulnerability is not remediated.

To mitigate CVE-2025-64627 effectively, organizations should implement a multi-layered approach beyond generic advice. First, apply strict input validation on all form fields to ensure that only expected data types and formats are accepted, rejecting or sanitizing any suspicious input. Second, implement robust output encoding or escaping mechanisms on all user-supplied content before rendering it in the browser to prevent script execution. Third, employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of any injected code. Fourth, restrict the use of vulnerable form fields or disable them if not essential, minimizing the attack surface. Fifth, monitor web application logs and user activity for unusual patterns indicative of attempted exploitation. Sixth, educate users and administrators about the risks of XSS and encourage cautious behavior when interacting with web content. Finally, stay alert for official Adobe patches or updates addressing this vulnerability and deploy them promptly once available. If immediate patching is not possible, consider implementing web application firewalls (WAFs) with custom rules to detect and block malicious payloads targeting the vulnerable fields. Regular security assessments and penetration testing focused on XSS vulnerabilities can help identify and remediate similar issues proactively.