CVE-2021-28625 in Experience Manager Cloud Service
Summary
by MITRE • 08/25/2021
Adobe Experience Manager Cloud Service offering, as well as versions 6.5.8.0 (and below) is affected by a Cross-Site Scripting (XSS) vulnerability that could be abused by an 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.
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Analysis
by VulDB Data Team • 09/19/2025
Adobe Experience Manager Cloud Service and versions 6.5.8.0 and below contain a cross-site scripting vulnerability that allows attackers to inject malicious scripts into form fields. This vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws in web applications. The flaw occurs when user input is not properly sanitized or validated before being rendered back to the browser, creating an opportunity for attackers to execute arbitrary JavaScript code in the context of the victim's browser session.
The technical implementation of this vulnerability enables attackers to manipulate form fields through crafted input that bypasses existing security controls. When victims interact with the affected application by submitting or viewing data in these vulnerable fields, the malicious scripts execute automatically within their browser environment. This represents a critical security risk as it can lead to session hijacking, data theft, or further exploitation of the victim's browser. The vulnerability specifically targets the rendering process of form data, where unfiltered user input is directly embedded into web pages without proper HTML encoding or sanitization.
The operational impact of this vulnerability extends beyond simple script execution as it provides attackers with a persistent vector for delivering more sophisticated attacks. Once an attacker successfully injects malicious code, they can potentially steal cookies, capture keystrokes, redirect users to malicious sites, or perform actions on behalf of authenticated users. This vulnerability affects the core functionality of Adobe Experience Manager's content management system, potentially compromising the integrity of web forms and user interactions across multiple sites utilizing the affected platform. The attack surface is particularly broad since many web applications rely on form-based data entry for user interactions and content management.
Organizations should implement immediate mitigations including input validation and sanitization of all user-supplied data before rendering it in web pages. The recommended approach involves implementing proper HTML encoding for all dynamic content and establishing robust content security policies. Security controls should include automatic sanitization of form inputs and regular security assessments of web application components. Additionally, organizations should consider implementing web application firewalls and monitoring for suspicious input patterns. This vulnerability aligns with attack techniques documented in the ATT&CK framework under the T1059.007 sub-technique for script injection attacks. Regular patching and updates of Adobe Experience Manager installations are essential to prevent exploitation, as this vulnerability has been addressed in subsequent releases through improved input validation mechanisms and enhanced sanitization protocols.