CVE-2025-64802 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 input is saved on the server and later rendered in users' browsers without proper sanitization or encoding. In this case, a low-privileged attacker can exploit vulnerable form fields within AEM to inject arbitrary JavaScript code. When a victim accesses the affected page, the malicious script executes in their browser context, potentially allowing the attacker to steal session cookies, perform actions on behalf of the user, or manipulate displayed content. The vulnerability has a CVSS 3.1 base score of 5.4, indicating medium severity. The vector details (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) show that the attack is network exploitable, requires low privileges and user interaction, affects confidentiality and integrity partially, and has a scope change due to the cross-site nature. No public exploits are known yet, but the vulnerability's presence in a widely used enterprise content management system makes it a significant concern. The lack of available patches at the time of publication means organizations must rely on interim mitigations. The vulnerability is categorized under CWE-79, which covers improper neutralization of input leading to XSS.

For European organizations, the impact of this vulnerability can be significant, especially for those relying on Adobe Experience Manager for web content management and digital experience delivery. Exploitation could lead to unauthorized disclosure of sensitive information such as authentication tokens or personal data, undermining confidentiality. Attackers might also manipulate web content, damaging integrity and potentially misleading users or defacing websites. Although availability is not directly impacted, the reputational damage and potential regulatory consequences under GDPR for data breaches could be severe. Given the medium severity and requirement for user interaction, the risk is moderate but non-negligible. Organizations in sectors like government, finance, healthcare, and media, which often use AEM, could face targeted attacks aiming to exploit this vulnerability to gain footholds or escalate privileges within their networks.

1. Monitor Adobe’s official channels for patches addressing CVE-2025-64802 and apply them promptly once released. 2. Implement strict input validation and output encoding on all form fields within AEM 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 XSS attacks. 4. Conduct regular security assessments and code reviews focusing on user input handling in AEM customizations. 5. Educate users and administrators about the risks of clicking on suspicious links or interacting with untrusted content. 6. Use web application firewalls (WAFs) with updated rules to detect and block XSS attack patterns targeting AEM. 7. Limit privileges of users who can submit data to vulnerable fields to reduce the attack surface. 8. Enable logging and monitoring to detect anomalous activities that may indicate exploitation attempts.