CVE-2026-48355 in Experience Manager
Summary
by MITRE • 07/14/2026
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 • 07/15/2026
Adobe Experience Manager suffers from a stored cross-site scripting vulnerability that represents a critical security flaw in the platform's content management capabilities. This vulnerability exists within the form handling mechanisms of AEM, where user input is not properly sanitized before being stored and subsequently rendered back to users. The flaw allows a low-privileged attacker to inject malicious javascript code into form fields that are later displayed to other users, creating a persistent threat vector that can affect multiple victims over time. The vulnerability is classified as a stored XSS issue under CWE-79 which specifically addresses the improper handling of untrusted data in web applications. This particular weakness enables attackers to execute arbitrary scripts within the context of a victim's browser session, potentially leading to complete compromise of user sessions and sensitive data exposure.
The operational impact of this vulnerability extends beyond simple script execution as it provides attackers with a persistent foothold within the AEM environment. When victims browse to pages containing the maliciously injected content, their browsers execute the embedded javascript code without proper sanitization or validation. This creates a scenario where attackers can perform actions such as stealing session cookies, redirecting users to malicious sites, or even executing more sophisticated attacks like credential harvesting. The low privilege requirement means that attackers do not need elevated permissions to exploit this vulnerability, making it particularly dangerous in environments where multiple users interact with AEM forms. From an attack chain perspective, this vulnerability aligns with ATT&CK technique T1566 which covers social engineering tactics involving malicious content delivery through web interfaces.
The scope of impact is significantly broadened by the nature of stored XSS attacks within content management systems like AEM. Since form fields are often used for user-generated content and collaborative work environments, a single compromised field can affect numerous users who view the content. The vulnerability's persistence means that even after initial exploitation, the malicious code continues to execute whenever affected pages are loaded, creating ongoing exposure for all users who encounter the compromised content. This makes the vulnerability particularly concerning in enterprise environments where AEM is used for customer portals, employee collaboration platforms, or public-facing websites where user input is frequently processed and displayed. Security teams must consider not only immediate remediation but also comprehensive monitoring for potential exploitation attempts across all form-based interfaces within the AEM platform.
Organizations should implement layered mitigation strategies to address this vulnerability effectively. Immediate patching of affected AEM versions represents the primary defense mechanism, as Adobe typically releases security patches for known vulnerabilities. Additionally, implementing robust input validation and output encoding mechanisms can prevent malicious scripts from being stored or executed in the first place. Content Security Policy headers should be configured to restrict script execution within AEM environments, while regular security scanning of form fields and user-generated content can help identify potential exploitation attempts. The implementation of web application firewalls specifically configured to detect and block XSS payloads provides an additional layer of protection that can help detect anomalous behavior even if other defenses fail. Regular security awareness training for developers and administrators regarding proper input handling and output encoding practices remains crucial in preventing similar vulnerabilities from emerging in future development cycles.