CVE-2025-46863 is a stored Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM) versions 6.5.22 and earlier. This vulnerability arises from insufficient input sanitization in certain form fields within AEM, allowing a low-privileged attacker to inject malicious JavaScript code that is persistently stored on the server. When a victim user accesses a page containing the compromised form field, the malicious script executes in their browser context. The vulnerability is characterized as a stored XSS (CWE-79), which is more dangerous than reflected XSS because the payload is saved and served to multiple users without requiring repeated attacker interaction. The CVSS 3.1 base score is 5.4 (medium severity), with vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N, indicating network attack vector, low attack complexity, requiring low privileges and user interaction, with a scope change and limited confidentiality and integrity impact but no availability impact. No known exploits are reported in the wild yet, and no patches have been linked at the time of publication. The vulnerability could be exploited to steal session cookies, perform actions on behalf of users, or deliver further malware, potentially compromising user accounts and sensitive data within the affected AEM environment.

For European organizations using Adobe Experience Manager, this vulnerability poses a risk to the confidentiality and integrity of web applications and their users. A successful exploit could lead to session hijacking, unauthorized actions, or data theft, especially in environments where AEM is used for customer-facing portals or internal intranet sites. Given that AEM is widely used by enterprises, government agencies, and media companies across Europe for content management and digital experience delivery, exploitation could result in reputational damage, regulatory non-compliance (e.g., GDPR violations due to data leakage), and operational disruption. The requirement for low privileges and user interaction lowers the barrier for exploitation, increasing risk in environments with many users accessing AEM-managed content. However, the absence of known exploits and the medium severity score suggest that immediate widespread impact may be limited but should not be underestimated.

European organizations should prioritize the following mitigation steps: 1) Apply any available security updates or patches from Adobe as soon as they are released. Since no patch links are currently available, monitor Adobe security advisories closely. 2) Implement strict input validation and output encoding on all form fields within AEM to prevent malicious script injection. 3) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers accessing AEM content. 4) Conduct thorough security testing, including automated and manual penetration testing focused on XSS vectors in AEM forms. 5) Educate users to recognize suspicious behavior and avoid interacting with untrusted links or inputs. 6) Use web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting AEM. 7) Review and minimize user privileges within AEM to reduce the attack surface. These steps, combined, will reduce the likelihood and impact of exploitation beyond generic advice.