CVE-2026-75730 in Experience Manager
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 client-side scripts into application form fields. This flaw stems from insufficient input validation and output encoding mechanisms within the content management system, which fails to properly sanitize user-supplied data before storing it in the backend database or rendering it back to users without adequate protection against script execution. The vulnerability is classified under CWE-79 as Improper Neutralization of Input During Web Page Generation, highlighting a critical failure in handling untrusted input within dynamic web content generation processes.
The operational impact of this vulnerability is significant because stored XSS attacks persist on the server side rather than being limited to single-session interactions like reflected XSS. When an attacker successfully injects malicious JavaScript into a form field, that script becomes part of the application's persistent data store. Consequently, every user who subsequently views or interacts with the affected page will have their browser execute the injected code automatically. This persistence mechanism amplifies the potential damage by allowing attackers to target multiple victims without requiring further interaction from the initial attacker after the payload is stored.
Attackers can leverage this vulnerability for various malicious activities including session hijacking, credential theft, defacement of web pages, or redirecting users to phishing sites. By executing arbitrary JavaScript in the context of the victim's browser and within the trusted domain of Adobe Experience Manager, attackers bypass same-origin policy restrictions that normally protect against cross-domain attacks. The scope change mentioned indicates that previously this might have required higher privileges but now low-privileged accounts can exploit it, significantly expanding the attack surface available to malicious insiders or compromised user credentials.
Mitigation strategies should focus on implementing robust input validation and output encoding practices across all form fields within Adobe Experience Manager. Developers must ensure that special characters are properly encoded before rendering content in HTML contexts using context-aware encoding techniques such as HTML entity encoding for body text, attribute value encoding for attributes, and JavaScript escaping where scripts are dynamically generated. Additionally, deploying Content Security Policy headers can help mitigate the impact by restricting script execution sources even if injection occurs. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other parts of the application that handle user input without adequate sanitization procedures aligned with OWASP guidelines for preventing cross-site scripting attacks.