CVE-2017-3890 in WatchDox Server
Summary
by MITRE
A reflected cross-site scripting vulnerability in the BlackBerry WatchDox Server components Appliance-X, version 1.8.1 and earlier, and vAPP, versions 4.6.0 to 5.4.1, allows remote attackers to execute script commands in the context of the affected browser by persuading a user to click an attacker-supplied malicious link.
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Analysis
by VulDB Data Team • 05/13/2026
The reflected cross-site scripting vulnerability identified as CVE-2017-3890 affects BlackBerry WatchDox Server components including the Appliance-X version 1.8.1 and earlier, as well as vAPP versions 4.6.0 through 5.4.1. This security flaw represents a critical weakness in the web application layer of these server components, creating an avenue for malicious actors to compromise user sessions and execute unauthorized code within the context of affected browsers. The vulnerability stems from improper input validation and output encoding mechanisms within the server's web interface, allowing attacker-controlled data to be reflected back to users without adequate sanitization. This type of vulnerability falls under the Common Weakness Enumeration category CWE-79, which specifically addresses cross-site scripting flaws where untrusted data is improperly incorporated into web pages served to users.
The operational impact of this vulnerability extends beyond simple script execution, as it enables attackers to perform session hijacking, steal sensitive user credentials, and potentially gain unauthorized access to corporate data repositories managed by the WatchDox platform. When users click on malicious links crafted by attackers, the reflected payload executes within their browser context, potentially allowing for complete compromise of user sessions and access to privileged information. The attack vector is particularly dangerous because it requires minimal user interaction beyond clicking a link, making it highly effective in phishing campaigns and social engineering attacks. According to the MITRE ATT&CK framework, this vulnerability maps to the technique T1059.001 for command and scripting interpreter, specifically through the use of JavaScript within the browser environment. The reflected nature of the vulnerability means that the malicious input must be passed through the server and then reflected back to the user's browser, which creates a specific attack pattern that security professionals can monitor and defend against.
Mitigation strategies for CVE-2017-3890 should prioritize immediate patching of affected components to the latest available versions that contain proper input validation and output encoding mechanisms. Organizations should implement comprehensive web application firewalls and content security policies to prevent unauthorized script execution, while also conducting thorough security assessments of all web interfaces within the WatchDox environment. Network segmentation and user access controls should be strengthened to limit the potential impact of successful exploitation, and regular security awareness training should be implemented to reduce the likelihood of users clicking malicious links. Additionally, organizations should establish monitoring protocols to detect and respond to suspicious web traffic patterns that may indicate attempts to exploit this vulnerability, with particular attention to reflected parameters in web requests that could contain malicious payloads. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and implementing robust input validation mechanisms across all web applications to prevent similar reflected XSS attacks from compromising user sessions and sensitive data.