CVE-2026-75677 in Experience Manager 6.5
Summary
by MITRE • 09/08/2026
Adobe Experience Manager is affected by a DOM-based Cross-Site Scripting (XSS) vulnerability. An attacker could exploit this issue by manipulating the DOM environment to execute malicious JavaScript within the context of the victim's browser. Exploitation of this issue requires user interaction in that a victim must visit a crafted webpage. Scope is changed.
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Analysis
by VulDB Data Team • 09/09/2026
Adobe Experience Manager contains a critical client-side security flaw classified as a Document Object Model-based Cross-Site Scripting vulnerability, commonly referred to as DOM XSS. This specific type of vulnerability arises when an application processes data from the URL or other sources in ways that can lead to unsafe execution of JavaScript within the browser environment. Unlike traditional stored or reflected XSS attacks where malicious scripts are embedded directly into server responses, this flaw involves the manipulation of the DOM itself by client-side script code. The root cause typically lies in the improper handling of user-supplied input that is subsequently used as a source for dynamic content generation without adequate sanitization or validation mechanisms to neutralize potentially harmful characters and commands.
The technical mechanism behind this vulnerability allows an attacker to inject malicious JavaScript payloads into specific parameters within the application's interface, such as URL fragments or query strings. When the victim interacts with the crafted webpage containing these manipulated elements, the browser interprets the injected code as legitimate script belonging to the Adobe Experience Manager domain. This execution occurs in the context of the trusted site, granting the attacker access to sensitive data and functionalities that are normally restricted by same-origin policies. The vulnerability is particularly dangerous because it bypasses many server-side security controls since the exploitation happens entirely on the client side within the user's browser session.
From an operational perspective, this vulnerability poses a significant risk to both end-users and enterprise administrators relying on Adobe Experience Manager for content management and digital experience delivery. Successful exploitation enables attackers to perform actions such as stealing session cookies, hijacking user sessions, performing unauthorized administrative actions, or redirecting users to phishing sites. The requirement for user interaction means that social engineering tactics are often employed to lure victims into visiting the malicious webpage. Once executed, the impact can range from minor data leakage to complete compromise of the victim's account and potentially sensitive organizational content stored within the platform.
This vulnerability aligns with CWE-79, which describes Improper Neutralization of Input During Web Page Generation known as Cross-site Scripting, specifically under the subcategory for DOM-based XSS where the script is executed via manipulation of the DOM environment rather than through server-side injection. In terms of offensive security frameworks, this attack vector corresponds to MITRE ATT&CK technique T1059.007, which covers JavaScript execution as a method for achieving initial access and further lateral movement within compromised environments. The change in scope indicates that previous assessments may have underestimated the impact or accessibility of this flaw, highlighting the need for immediate remediation efforts.
Mitigation strategies should focus on implementing robust input validation and output encoding practices at both the client-side script level and server-side configuration layers. Developers must ensure that any data derived from URL parameters or other dynamic sources is properly sanitized before being written to the DOM using safe APIs such as textContent rather than innerHTML where possible. Additionally, deploying Content Security Policy headers can significantly reduce the impact of successful XSS attacks by restricting the domains from which scripts are allowed to load and execute. Regular security audits and penetration testing focused on client-side logic flaws are essential for maintaining the integrity of Adobe Experience Manager deployments in production environments.