CVE-2025-64823 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. This vulnerability allows a low-privileged attacker to inject malicious JavaScript code into vulnerable form fields within AEM-managed websites. When a victim user visits a page containing the injected script, the malicious code executes in their browser context. The attack exploits improper input sanitization and output encoding in form fields, enabling script injection that persists in the application’s stored data. The vulnerability requires the attacker to have some level of access to submit data (low privilege) and the victim to interact with the affected page (user interaction). The CVSS 3.1 base score is 5.4, reflecting network attack vector, low attack complexity, low privileges required, user interaction needed, and impacts on confidentiality and integrity but not availability. The vulnerability’s scope is changed (S:C), indicating that exploitation can affect resources beyond the vulnerable component, such as user sessions or other users’ data. Currently, no public exploits are known, and no patches have been linked yet, though Adobe is expected to release updates. Stored XSS in AEM is particularly dangerous because AEM is widely used for enterprise content management and public-facing websites, increasing the potential victim pool. Attackers could leverage this vulnerability to steal session cookies, perform actions on behalf of users, or deliver further malware payloads. The vulnerability is classified under CWE-79, a common web security weakness related to improper neutralization of input during web page generation.

For European organizations, the impact of CVE-2025-64823 can be significant, especially for those relying on Adobe Experience Manager to manage public-facing websites or intranet portals. Exploitation can lead to theft of user credentials, session hijacking, unauthorized actions performed in the context of legitimate users, and potential defacement or manipulation of web content. This can damage organizational reputation, lead to data breaches involving personal or sensitive information, and disrupt business operations. Given the widespread use of AEM in sectors such as government, finance, healthcare, and media across Europe, the vulnerability poses a risk to critical services and citizen-facing platforms. The confidentiality and integrity of user data are primarily at risk, while availability is not directly impacted. The requirement for user interaction and low privileges reduces the ease of exploitation but does not eliminate the threat, especially in environments with high user traffic and limited input validation controls. The lack of known exploits in the wild currently reduces immediate risk but organizations should prepare for potential future attacks once exploit code becomes available.

1. Monitor Adobe’s official security advisories and apply patches or updates for Adobe Experience Manager as soon as they are released to address CVE-2025-64823. 2. Implement strict input validation on all form fields to reject or sanitize potentially malicious input before storage. 3. Apply robust output encoding/escaping on all user-supplied data rendered in web pages to prevent script execution. 4. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 5. Limit user privileges and access rights to form submission features to reduce the attack surface. 6. Conduct regular security assessments and penetration testing focused on web application vulnerabilities, including stored XSS. 7. Educate web developers and administrators about secure coding practices specific to AEM and XSS prevention. 8. Use web application firewalls (WAFs) with updated rules to detect and block XSS attack patterns targeting AEM. 9. Review and harden AEM configurations to disable or restrict unnecessary features that could be exploited for injection. 10. Monitor logs and user activity for suspicious behavior indicative of exploitation attempts.