CVE-2023-0486 in VitalPBX
Summary
by MITRE • 04/05/2023
VitalPBX version 3.2.3-8 allows an unauthenticated external attacker to obtain the instance's administrator account via a malicious link. This is possible because the application is vulnerable to XSS.
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Analysis
by VulDB Data Team • 07/09/2025
The vulnerability identified as CVE-2023-0486 represents a critical security flaw in VitalPBX version 3.2.3-8 that exposes administrators to unauthorized access through cross-site scripting attacks. This vulnerability enables external attackers to exploit the system without requiring authentication credentials, creating a significant risk for organizations relying on this telephony platform. The flaw stems from inadequate input validation and output encoding mechanisms within the application's web interface, allowing malicious actors to inject malicious scripts that can hijack administrator sessions.
The technical implementation of this vulnerability occurs through XSS exploitation techniques that leverage the application's failure to properly sanitize user inputs and validate data before rendering it in web pages. When an administrator clicks on a maliciously crafted link, the injected script executes within the context of their browser session, potentially capturing session cookies, credentials, or other sensitive information. This type of vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws where applications fail to properly validate or encode user-supplied data before incorporating it into dynamically generated web pages.
The operational impact of CVE-2023-0486 extends beyond simple credential theft, as successful exploitation can lead to complete system compromise and unauthorized access to voice communication services. Attackers can leverage the compromised administrator account to modify system configurations, add malicious users, redirect calls, or even exfiltrate sensitive telephony data. This vulnerability particularly affects organizations using VitalPBX for business communications, as it undermines the fundamental security assumptions of the platform and exposes critical infrastructure to unauthorized manipulation. The risk is compounded by the fact that no authentication is required for the initial exploitation, making it particularly dangerous for remote attackers.
Security professionals should implement immediate mitigations including input validation controls, output encoding mechanisms, and the implementation of Content Security Policy headers to prevent script execution. Organizations should also consider deploying web application firewalls to detect and block malicious requests targeting this vulnerability. According to ATT&CK framework technique T1531, this vulnerability aligns with the use of malicious links to gain access to privileged accounts, while T1190 represents the exploitation of web application vulnerabilities for initial access. The most effective remediation involves updating to a patched version of VitalPBX, implementing proper XSS prevention measures, and conducting comprehensive security assessments of the web application interface to identify similar vulnerabilities that may exist within the system's attack surface.