CVE-2026-27229 in Experience Manager
Summary
by MITRE • 03/11/2026
Adobe Experience Manager versions 6.5.23 and earlier are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by an attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim’s browser when they browse to the page containing the vulnerable field.
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Analysis
by VulDB Data Team • 03/16/2026
Adobe Experience Manager versions 6.5.23 and earlier contain a critical stored cross-site scripting vulnerability that represents a significant threat to web application security. This vulnerability falls under the CWE-79 category, which specifically addresses cross-site scripting flaws in web applications. The flaw exists within the form processing mechanisms of AEM, where user input is not properly sanitized or validated before being stored and subsequently rendered back to users. Attackers can exploit this weakness by submitting malicious JavaScript code through form fields that are later displayed on web pages, creating a persistent XSS attack vector that can affect multiple users who interact with the compromised content.
The technical implementation of this vulnerability allows attackers to inject malicious scripts that execute in the context of the victim's browser session. When users navigate to pages containing the vulnerable form data, their browsers execute the injected JavaScript code without proper security restrictions. This stored nature of the vulnerability means that the malicious payload persists in the application's database or storage system, making it particularly dangerous as it can affect numerous users over extended periods. The attack vector specifically targets form fields within AEM's content management system, where user-generated content is processed and displayed without adequate input validation or output encoding measures.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities. Security researchers have documented that such stored XSS vulnerabilities can be leveraged for session hijacking, credential theft, data exfiltration, and privilege escalation within the application. The attack can be amplified through social engineering tactics, where attackers craft convincing malicious content that encourages users to interact with compromised forms. This vulnerability also represents a significant risk to enterprise environments where AEM is used for content management, as it can compromise sensitive business data and potentially provide attackers with access to administrative functions within the CMS.
Organizations utilizing Adobe Experience Manager versions 6.5.23 and earlier should immediately implement comprehensive mitigation strategies to address this vulnerability. The primary recommendation involves upgrading to Adobe Experience Manager 6.5.24 or later versions where this vulnerability has been patched. Additionally, implementing robust input validation and output encoding mechanisms can provide defense-in-depth measures while awaiting the official security update. Security teams should conduct thorough vulnerability assessments of all form-based content management areas and implement Content Security Policy headers to limit script execution capabilities. The vulnerability also aligns with ATT&CK technique T1531 which focuses on credential access through web application vulnerabilities, making it essential for organizations to monitor for potential exploitation attempts and maintain comprehensive security monitoring of their AEM environments.