CVE-2026-75642 in Experience Manager
Summary
by MITRE • 09/08/2026
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 to inject malicious script content directly into application data stores rather than transient input fields. This specific flaw arises from insufficient validation and sanitization of user-supplied data within form handling mechanisms, enabling the persistence of harmful code on the server side before it is served to other users. Unlike reflected XSS where payloads are delivered via URLs or headers, stored XSS embeds the malicious payload in a database or file system, ensuring that every time an authorized user accesses the affected page containing the vulnerable field, the browser executes the injected script automatically without further interaction from the attacker.
The operational impact of this vulnerability is significant because it shifts the attack vector from targeting specific individuals through social engineering to potentially compromising any authenticated user who views the infected content. When a victim browses to the compromised page, their web browser interprets and runs the malicious JavaScript within the context of the Adobe Experience Manager domain. This allows the attacker to perform actions such as stealing session cookies or authentication tokens, hijacking administrative sessions, defacing websites, redirecting users to phishing sites, or executing arbitrary commands if combined with other vulnerabilities in the client-side environment. The ability for low-privileged attackers to achieve this execution demonstrates a critical failure in privilege separation and input validation logic within the application framework.
From an industry standards perspective, this vulnerability aligns closely with CWE-79 Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting specifically under the Stored subtype often categorized as CWE-80 or CWE-83 depending on the specific encoding bypass technique used. In terms of tactical mapping within the MITRE ATT&CK framework, this activity corresponds to T1059 Command and Control Execution particularly when scripts are used for lateral movement or data exfiltration, and potentially T1204 User Execution if it requires user interaction like clicking a link though stored XSS often bypasses explicit clicks by auto-executing on page load. The scope change mentioned in the advisory indicates that previously this might have been considered out of bounds for low-privilege users but has now been confirmed as exploitable, expanding the attack surface significantly within enterprise deployments where multiple user roles interact with shared content repositories.
Mitigation strategies must focus on implementing robust input validation and output encoding mechanisms at both the application layer and the database interaction layer to ensure that special characters are properly escaped before rendering in HTML contexts. Developers should adopt a whitelist approach for allowed inputs rather than relying solely on blacklist filters which can be bypassed using obfuscation techniques or alternative encodings. Additionally, deploying Content Security Policy headers can help mitigate the impact by restricting where scripts can load from and preventing inline script execution even if an injection occurs. Regular security audits focusing on form handling logic and continuous monitoring for anomalous data patterns in stored fields are essential to detect such injections early before they affect a broad user base.