CVE-2025-64796 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 a low-privileged attacker to inject malicious JavaScript code that is stored persistently on the server. When other users access the affected pages containing these fields, the malicious script executes in their browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed in the context of the victim's session. The vulnerability is classified under CWE-79 and has a CVSS 3.1 base score of 5.4, indicating medium severity. The vector metrics specify network attack vector (AV:N), low attack complexity (AC:L), requiring low privileges (PR:L), and user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability affects resources beyond the vulnerable component. Confidentiality and integrity impacts are low, with no availability impact. No public exploits have been reported yet, but the vulnerability poses a risk to organizations relying on AEM for web content management. Since AEM is widely used in enterprise and government websites, exploitation could lead to data leakage or unauthorized actions within affected web applications. The vulnerability was published on December 10, 2025, with no patch links currently available, emphasizing the need for proactive mitigation.

For European organizations, this vulnerability can lead to unauthorized script execution in users' browsers, potentially compromising sensitive information such as authentication tokens, personal data, or enabling phishing attacks. Organizations using Adobe Experience Manager for customer-facing websites or internal portals risk reputational damage, regulatory non-compliance (e.g., GDPR breaches due to data exposure), and operational disruptions if attackers leverage the vulnerability for further exploitation. The medium severity score reflects moderate risk, but the widespread use of AEM in Europe, especially in sectors like finance, government, and retail, increases the potential impact. Attackers could exploit this vulnerability to target employees or customers, leading to credential theft or session hijacking. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits after public disclosure. The vulnerability's requirement for user interaction means phishing or social engineering could be used to increase success rates. Overall, the threat could undermine trust in affected web services and lead to financial and legal consequences for European entities.

1. Monitor Adobe's official channels for patches or security updates addressing CVE-2025-64796 and apply them promptly once available. 2. Implement strict input validation on all form fields to sanitize and reject malicious scripts before storage. 3. Employ robust output encoding/escaping techniques to ensure that any user-supplied data rendered in web pages cannot execute as code. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS payloads. 5. Conduct regular security audits and penetration testing focused on input handling and XSS vulnerabilities within AEM implementations. 6. Educate users and administrators about the risks of phishing and social engineering that could facilitate exploitation. 7. Use web application firewalls (WAFs) with updated rulesets to detect and block malicious payloads targeting known vulnerable endpoints. 8. Limit privileges of users who can submit data to vulnerable forms to reduce the attack surface. 9. Review and harden AEM configurations to minimize exposure of vulnerable components. 10. Implement logging and monitoring to detect suspicious activities indicative of exploitation attempts.