CVE-2025-64626 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 visit the compromised 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 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) indicates network attack vector, low attack complexity, requiring low privileges and user interaction, with a scope change due to potential cross-origin impacts. No availability impact is noted. No patches are currently linked, and no known exploits in the wild have been reported, but the vulnerability is publicly disclosed as of December 10, 2025. Adobe Experience Manager is widely used by enterprises for web content management, making this vulnerability significant for organizations relying on AEM for public-facing or internal portals. Attackers exploiting this flaw could execute arbitrary scripts, leading to session hijacking, credential theft, or defacement. The vulnerability requires user interaction (visiting the malicious page) and some level of privilege to inject the payload, but once exploited, it can affect any user accessing the compromised content. The scope change (S:C) suggests that the vulnerability could impact resources beyond the initially vulnerable component, potentially affecting other users or systems within the same domain or application context.

For European organizations, the impact of CVE-2025-64626 can be significant, especially for those using Adobe Experience Manager to manage public-facing websites or internal portals. Exploitation could lead to unauthorized access to user sessions, theft of sensitive information, and potential defacement or misinformation campaigns. This can damage organizational reputation, lead to regulatory non-compliance (e.g., GDPR breaches if personal data is exposed), and disrupt business operations. Since AEM is used by many government agencies, financial institutions, and large enterprises in Europe, the risk extends to critical infrastructure and sensitive sectors. The medium CVSS score reflects moderate risk, but the real-world impact depends on the deployment context and the sensitivity of the data accessible via the vulnerable application. The requirement for user interaction and low privileges to inject payloads means attackers could leverage social engineering or phishing to increase exploitation success. The scope change indicates that the vulnerability could affect multiple users and components, amplifying potential damage.

1. Monitor Adobe’s official channels for patches addressing CVE-2025-64626 and apply them promptly once released. 2. Implement strict input validation on all form fields to reject or sanitize potentially malicious scripts before storage. 3. Employ comprehensive output encoding/escaping to ensure that stored data is safely rendered in browsers, preventing script execution. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 5. Conduct regular security audits and penetration testing focused on web application vulnerabilities, including stored XSS. 6. Educate users and administrators about the risks of clicking unknown links or submitting untrusted content. 7. Use web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting AEM. 8. Limit privileges for users who can submit content to reduce the risk of malicious input injection. 9. Segment and isolate critical web applications to contain potential exploitation impact. 10. Review and harden AEM configurations to minimize attack surface and disable unnecessary features that could be exploited.