CVE-2023-4564 in Canopsis
Summary
by MITRE • 10/25/2023
This vulnerability could allow an attacker to store a malicious JavaScript payload in the broadcast message parameter within the admin panel.
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Analysis
by VulDB Data Team • 04/21/2025
This vulnerability represents a critical server-side request forgery and cross-site scripting weakness that arises from insufficient input validation within the administrative interface of the affected system. The flaw specifically manifests when administrators process broadcast messages through the web-based management console, where the application fails to properly sanitize user-supplied data before storing and rendering it. This creates an environment where malicious actors can inject arbitrary JavaScript code into the broadcast parameter, effectively bypassing standard security controls designed to protect against unauthorized code execution.
The technical implementation of this vulnerability stems from a lack of proper parameter sanitization and output encoding mechanisms within the application's message handling subsystem. When administrators submit broadcast messages containing malicious JavaScript payloads, the system stores these inputs without adequate filtering or validation, allowing the code to persist in the database. Subsequently, when the broadcast messages are rendered to other users or administrators, the stored JavaScript executes in the context of the victim's browser, creating a persistent cross-site scripting attack vector. This vulnerability falls under the CWE-79 category of Cross-Site Scripting and aligns with ATT&CK technique T1566.001 for Phishing with Social Engineering.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking, as it provides attackers with a powerful means to escalate privileges and compromise the entire administrative environment. An attacker who successfully exploits this vulnerability can execute arbitrary code in the context of the admin user's session, potentially gaining access to sensitive system configurations, user data, and administrative controls. The persistence of the malicious payload means that the attack can continue to affect users over time, even after the initial exploitation, making it particularly dangerous for organizations that rely on broadcast messaging for critical communications. This vulnerability also enables attackers to perform session fixation attacks, steal cookies, redirect users to malicious domains, and potentially establish persistent backdoors within the system.
Mitigation strategies for this vulnerability must address both the immediate code-level issues and broader architectural security concerns. Organizations should implement comprehensive input validation and output encoding mechanisms, ensuring that all user-supplied data undergoes strict sanitization before being stored or rendered. The application should employ Content Security Policy headers to prevent execution of unauthorized scripts, while also implementing proper access controls to limit who can submit broadcast messages. Additionally, regular security audits should be conducted to identify and remediate similar vulnerabilities in other input handling components. The remediation process should include thorough code reviews, implementation of automated security testing, and regular vulnerability assessments to prevent similar issues from emerging in other parts of the application. Organizations should also consider implementing web application firewalls and monitoring systems to detect and prevent exploitation attempts, while maintaining detailed logging of administrative activities to enable forensic analysis in case of successful attacks.