CVE-2026-75742 in Experience Manager as a Cloud Service
Summary
by MITRE • 09/09/2026
Adobe Experience Manager is affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a low-privileged 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. Scope is changed.
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Analysis
by VulDB Data Team • 09/09/2026
Adobe Experience Manager contains a stored Cross-Site Scripting vulnerability that allows attackers with lower privileges than administrators to inject malicious script code into application form fields. This flaw arises because the system fails to properly sanitize user-supplied input before storing it in persistent storage, such as a database or content repository. Unlike reflected XSS where the payload is delivered via an HTTP request and executed immediately, stored XSS involves saving the malicious data on the target server. Consequently, when other users subsequently access pages that render this unsanitized content, their browsers execute the injected scripts automatically without any further interaction from the attacker regarding delivery.
The operational impact of this vulnerability is significant because it enables a low-privileged user to compromise the security context of higher-privilege victims or administrators who view the affected forms. Once executed within the victim's browser session, the malicious JavaScript can perform actions on behalf of that user. This may include stealing sensitive cookies and authentication tokens, capturing keystrokes, performing unauthorized administrative actions through the application interface, or redirecting users to phishing sites designed to harvest credentials. The scope change indicates that previously this might have required higher privileges or a different attack vector, but now even basic authenticated users can leverage this flaw for broader impact.
From an industry standards perspective, this vulnerability aligns with CWE-79 Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. Specifically it falls under the stored variant where malicious scripts are permanently stored within target servers. In terms of adversary tactics and techniques such as MITRE ATT&CK this behavior maps to T1059 Command and Control scripting which allows attackers to execute arbitrary code in victim environments, and potentially T1534 Internal Spearphishing if used for credential harvesting among internal users. The persistence aspect means the attack does not require repeated exploitation attempts per victim once the payload is stored making it efficient for widespread compromise within an organization using Adobe Experience Manager.
Mitigation strategies should focus on implementing robust input validation and output encoding mechanisms across all form fields in Adobe Experience Manager applications. Developers must ensure that any user-supplied data rendered back to browsers is properly encoded according to context such as HTML entity encoding or JavaScript string escaping depending on where the data appears within the DOM structure. Additionally applying Content Security Policy headers can help mitigate the impact by restricting script execution sources and preventing inline scripts from running even if injected. Regular security audits and static code analysis tools should be employed to detect similar patterns in custom components developed for the platform ensuring that future updates do not reintroduce these weaknesses while maintaining compliance with secure coding standards like OWASP Top Ten guidelines regarding injection flaws.