CVE-2025-64826 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM), specifically affecting versions 6.5.23 and earlier. This vulnerability arises from insufficient sanitization of user-supplied input in certain form fields, allowing a low-privileged attacker to inject malicious JavaScript code that is stored persistently on the server. When legitimate users access the affected pages containing the injected scripts, the malicious code executes in their browsers within the security context of the vulnerable web application. The attack vector is network-based, requiring the attacker to submit crafted input through vulnerable forms, and user interaction is necessary for the payload to execute (i.e., a victim must visit the compromised page). The CVSS 3.1 base score of 5.4 reflects medium severity, with the attack complexity being low and privileges required being low, but user interaction is mandatory. The vulnerability impacts confidentiality and integrity by enabling potential theft of session cookies, credentials, or manipulation of displayed content, but it does not directly affect availability. No public exploit code or active exploitation has been reported to date. Adobe has not yet released patches, but organizations are advised to monitor for updates. The vulnerability is classified under CWE-79, which is a common and well-understood web application security issue. Given AEM’s widespread use in enterprise content management and digital experience delivery, exploitation could lead to significant reputational and operational damage if attackers leverage this flaw to compromise user sessions or inject malicious content.

For European organizations, the impact of CVE-2025-64826 can be significant, particularly for those relying on Adobe Experience Manager to manage public-facing websites or internal portals. Successful exploitation could lead to unauthorized disclosure of sensitive information such as session tokens or personal data, enabling further attacks like account takeover or phishing. Integrity of web content could be compromised, leading to defacement or distribution of malware to end users. While availability is not directly impacted, the reputational damage and potential regulatory consequences under GDPR for data breaches could be substantial. Organizations in sectors such as finance, government, healthcare, and e-commerce, which often use AEM for digital services, are at higher risk. The medium severity rating suggests that while exploitation is feasible, it requires some user interaction and low privileges, which somewhat limits the attack scope but does not eliminate risk. The absence of known exploits in the wild provides a window for proactive mitigation. However, failure to address this vulnerability promptly could expose organizations to targeted attacks or automated scanning by opportunistic threat actors.

1. Monitor Adobe’s official channels closely for the release of security patches addressing CVE-2025-64826 and apply them immediately upon availability. 2. Implement strict input validation and output encoding on all form fields to prevent injection of malicious scripts, using frameworks or libraries that automatically handle XSS protection. 3. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers, reducing the impact of any injected code. 4. Conduct regular security audits and penetration testing focused on web application vulnerabilities, including stored XSS, to identify and remediate weaknesses proactively. 5. Use web application firewalls (WAFs) configured to detect and block common XSS attack patterns targeting AEM instances. 6. Educate developers and administrators on secure coding practices and the risks associated with XSS vulnerabilities. 7. Monitor logs and user reports for signs of suspicious activity or unexpected script execution on affected web pages. 8. Limit the privileges of users who can submit data to vulnerable forms to reduce the attack surface. 9. Consider temporary mitigation by disabling or restricting vulnerable form functionalities if patching is delayed. 10. Ensure incident response plans include procedures for handling XSS incidents to minimize damage and recovery time.