CVE-2025-46866: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-46866 is a stored Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager (AEM) that allows a low-privileged attacker to inject malicious scripts into vulnerable form fields. Affected versions include AEM 6.5.22 and earlier (on-premise) and AEM Cloud Service versions prior to 2025.5.0. The vulnerability was published on June 10, 2025, with a patch made available shortly after. It carries a CVSS v3.1 base score of 5.4 (Medium) (Adobe Advisory).

The root cause is improper neutralization of user-supplied input during web page generation (CWE-79), specifically in form fields within Adobe Experience Manager. A low-privileged authenticated attacker can inject persistent malicious JavaScript into vulnerable form fields; the script is stored server-side and executes in any victim's browser when they navigate to the page containing the compromised field. Exploitation requires the attacker to have at least low-level privileges on the AEM instance and requires a victim user to visit the affected page (user interaction required). No public proof-of-concept or technical write-up has been identified at this time (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of a victim's browser session, potentially leading to session token theft, credential harvesting, unauthorized actions performed on behalf of the victim, and manipulation of page content. The changed scope indicator reflects that the impact extends beyond the attacker's own session to affect other users of the AEM instance. Availability is not directly impacted, but confidentiality and integrity are both rated as low impact per the CVSS assessment (Adobe Advisory).

There is no evidence of active in-the-wild exploitation or a publicly available proof-of-concept exploit for CVE-2025-46866 at this time. The vulnerability has not been added to the CISA Known Exploited Vulnerabilities (KEV) catalog. The EPSS score is approximately 0.029%, indicating a low probability of exploitation in the near term. No threat actor attribution has been reported (Adobe Advisory).

Adobe has released patches addressing this vulnerability: on-premise AEM users should upgrade to version 6.5.23.0 or later, while AEM Cloud Service users should upgrade to version 2025.5.0 or later. As additional hardening measures, organizations should implement strict input validation and output encoding on all form fields, deploy a Content Security Policy (CSP) to restrict unauthorized script execution, and limit user privileges to reduce the attack surface. Regularly auditing and sanitizing user-supplied content in AEM is also recommended (Adobe Advisory).

The Center for Internet Security (CIS) issued an advisory noting multiple vulnerabilities in Adobe products, including this XSS issue, as part of a broader June 2025 Adobe security update cycle. No notable independent researcher commentary or significant social media discussion has been identified for this specific CVE (CIS Advisory).