CVE-2025-41042 in CMF
Summary
by MITRE • 09/04/2025
A vulnerability has been discovered in appRain CMF version 4.0.5, consisting of a stored authenticated XSS due to a lack of proper validation of user input, through the 'data[Option][message]', 'data[Option][subject]' and 'data[Option][templatetype]' parameters in /apprain/information/manage/emailtemplate/add.
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Analysis
by VulDB Data Team • 09/05/2025
This vulnerability represents a critical stored cross-site scripting flaw in appRain CMF version 4.0.5 that allows authenticated attackers to inject malicious scripts into the application's email template management functionality. The vulnerability specifically affects the email template creation process where user input is not properly sanitized or validated before being stored in the application's database. Attackers can exploit this weakness by submitting crafted payloads through three distinct parameters within the email template management endpoint at /apprain/information/manage/emailtemplate/add. The parameters affected include 'data[Option][message]', 'data[Option][subject]', and 'data[Option][templatetype]' which collectively enable the execution of malicious code when templates are rendered to end users. This stored XSS vulnerability falls under CWE-79 which categorizes cross-site scripting as a common web application security flaw occurring when applications fail to properly validate or escape user-provided data before incorporating it into dynamic web content. The attack requires an authenticated user context, meaning that an attacker must first gain valid credentials to the application before exploiting this vulnerability, though the impact remains significant due to the persistent nature of stored XSS attacks.
The operational impact of this vulnerability extends beyond simple script execution as it provides attackers with the ability to hijack user sessions, steal sensitive information, and potentially escalate privileges within the application environment. When malicious scripts are stored in the database and subsequently rendered to other users who view the affected email templates, the attacker can execute arbitrary JavaScript code within the context of those users' browsers. This creates a persistent threat that can affect multiple users over time, as the malicious content remains stored in the application's backend until manually removed. The vulnerability enables attackers to perform actions such as cookie theft, session manipulation, and redirection to malicious sites, all while appearing to originate from legitimate application functionality. The attack vector leverages the application's trust in authenticated users, making it particularly dangerous as the malicious code can execute with the privileges of the victim user, potentially leading to complete account compromise or unauthorized access to sensitive application features.
Security mitigations for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's data processing pipeline. The most effective remediation involves sanitizing all user input through proper validation routines that reject or escape potentially dangerous characters and script tags before storing data in the database. Additionally, implementing Content Security Policy headers can provide an additional layer of protection by restricting the sources from which scripts can be executed within the application's context. The application should also employ proper output encoding when rendering user-provided content, ensuring that any potentially malicious input is properly escaped before being displayed to users. Organizations should implement regular security testing including automated vulnerability scanning and manual penetration testing to identify similar issues in other application components. According to ATT&CK framework, this vulnerability maps to T1531 which covers "Modify Existing Service" and T1203 which addresses "Exploitation for Client Execution", highlighting the need for both server-side input validation and client-side security controls. The remediation process should include thorough code review of all user input handling mechanisms, particularly within administrative interfaces where the risk of privilege escalation exists. Regular security updates and patch management processes should be implemented to ensure that such vulnerabilities are promptly addressed when discovered.