CVE-2025-64554 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 scripts injected by an attacker are permanently stored on the target server, such as within form fields, and later executed in the browsers of users who access the affected content. In this case, a low-privileged attacker can exploit vulnerable form fields to inject JavaScript code that executes when other users view the page. The vulnerability impacts confidentiality and integrity by enabling attackers to steal session cookies, perform actions on behalf of users, or manipulate displayed content. The CVSS 3.1 score of 5.4 indicates medium severity, with attack vector being network accessible, low attack complexity, requiring privileges (PR:L), and user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. No patches are currently linked, and no known exploits have been reported in the wild as of the publication date. Adobe Experience Manager is widely used by enterprises for web content management, making this vulnerability significant for organizations relying on AEM for digital experience delivery. The vulnerability emphasizes the importance of secure input handling and output encoding to prevent script injection. Additionally, the use of Content Security Policy (CSP) can mitigate the impact by restricting script execution. Organizations should monitor Adobe's advisories for patches and apply them promptly once available.

For European organizations, this vulnerability poses a risk of session hijacking, data theft, and unauthorized actions performed through compromised user sessions. Since AEM is often used to manage corporate websites, intranets, and customer portals, exploitation could lead to leakage of sensitive information or defacement of public-facing content, damaging reputation and trust. The medium severity score reflects moderate impact, but the scope change indicates that exploitation could affect multiple components or users beyond the initial vulnerable input. Attackers with low privileges can exploit this, increasing the risk from insider threats or compromised accounts. The requirement for user interaction means phishing or social engineering could be used to lure victims to vulnerable pages. European organizations in sectors such as finance, government, and media that rely heavily on AEM for content delivery are particularly at risk. The absence of known exploits currently provides a window for proactive mitigation before active attacks emerge.

1. Monitor Adobe's official security advisories and apply patches for AEM as soon as they are released to address CVE-2025-64554. 2. Implement strict server-side input validation and sanitization on all form fields to prevent injection of malicious scripts. 3. Employ robust output encoding (e.g., HTML entity encoding) when rendering user-supplied data to ensure scripts are not executed. 4. Configure Content Security Policy (CSP) headers to restrict the execution of inline scripts and loading of untrusted resources, reducing the impact of XSS. 5. Conduct regular security assessments and code reviews focusing on input handling in AEM implementations. 6. Educate users and administrators about phishing risks and the importance of cautious interaction with web content. 7. Use web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting AEM. 8. Limit privileges of users who can submit content to reduce the attack surface. 9. Consider implementing multi-factor authentication (MFA) to reduce the risk of compromised accounts being used to exploit this vulnerability.