Adobe Experience Manager Blind XXE via package upload
Description
Adobe Experience Manager (AEM) is a comprehensive content management solution for building websites, mobile applications, and forms.
This vulnerability allows attackers to exploit a Blind XML External Entity (XXE) injection flaw in the Jackrabbit package upload functionality. When processing specially crafted XML content within uploaded packages, AEM fails to properly disable external entity resolution, enabling attackers to trigger out-of-band interactions with external systems without requiring authentication.
Remediation
Apply the latest security hotfixes for Adobe Experience Manager immediately by following these steps:<br/><br/>1. Review the Adobe Security Bulletin APSB25-90 to identify the appropriate hotfix for your AEM version<br/>2. Download the security hotfix package from Adobe's official distribution channels<br/>3. Test the hotfix in a non-production environment to ensure compatibility with your customizations<br/>4. Schedule a maintenance window and deploy the hotfix to production systems following Adobe's installation guidelines<br/>5. Verify the fix by confirming that XML parsing in package uploads no longer processes external entities<br/><br/>As an interim mitigation if immediate patching is not possible, restrict access to the package upload functionality to only trusted, authenticated administrators through network-level controls or AEM's access control lists (ACLs). Additionally, implement web application firewall (WAF) rules to detect and block XML payloads containing DOCTYPE declarations or ENTITY definitions in package upload requests.