CVE-2025-64615 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. This vulnerability arises from insufficient sanitization of user input in certain form fields, allowing an attacker with low privileges to inject malicious JavaScript code that is stored persistently on the server. When legitimate users access the affected page containing the injected script, the malicious code executes in their browsers within the security context of the vulnerable application. The attack vector is network-based, requiring the attacker to submit crafted input to the vulnerable form fields. The vulnerability has a CVSS 3.1 base score of 5.4, indicating medium severity, with the vector string AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. This means the attack can be performed remotely over the network with low complexity, requires low privileges, and user interaction (visiting the page) is necessary to trigger the exploit. The impact primarily affects confidentiality and integrity, as attackers can steal session cookies, perform actions on behalf of users, or manipulate displayed content. Availability is not impacted. No patches or exploit code are currently publicly available, and no known exploits in the wild have been reported. However, given the widespread use of Adobe Experience Manager in enterprise content management and digital experience platforms, this vulnerability poses a significant risk if left unaddressed.

For European organizations, the impact of this vulnerability can be substantial, especially for those relying on Adobe Experience Manager to deliver web content and digital services. Successful exploitation could lead to session hijacking, unauthorized actions performed on behalf of users, defacement of websites, or distribution of malware through trusted domains. This undermines user trust, potentially leads to data breaches involving personal or sensitive information, and may cause reputational damage. Sectors such as finance, government, healthcare, and e-commerce, which often use AEM for customer-facing portals, are particularly at risk. Additionally, the cross-site scripting vulnerability could be leveraged as a foothold for further attacks within an organization's network. The medium CVSS score reflects that while exploitation requires some privileges and user interaction, the potential for data compromise and integrity loss is significant. Given the interconnected nature of European digital infrastructure and stringent data protection regulations like GDPR, exploitation could also result in regulatory penalties and legal consequences.

To mitigate this vulnerability effectively, European organizations should: 1) Monitor Adobe's security advisories closely and apply official patches or updates for Adobe Experience Manager as soon as they become available. 2) Implement strict input validation and output encoding on all user-supplied data, especially in form fields, to prevent injection of malicious scripts. 3) Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 4) Conduct regular security assessments and code reviews of custom AEM components or extensions that handle user input. 5) Educate users and administrators about the risks of XSS and encourage cautious behavior when interacting with web content. 6) Use web application firewalls (WAFs) with rules tuned to detect and block XSS payloads targeting AEM. 7) Limit privileges for users who can submit content to minimize the risk from low-privileged attackers. 8) Monitor logs and network traffic for suspicious activities indicative of exploitation attempts. These measures, combined with prompt patching, will reduce the likelihood and impact of exploitation.