CVE-2014-2712 in Junos
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in J-Web in Juniper Junos before 10.0S25, 10.4 before 10.4R10, 11.4 before 11.4R11, 12.1 before 12.1R9, 12.1X44 before 12.1X44-D30, 12.1X45 before 12.1X45-D20, 12.1X46 before 12.1X46-D10, and 12.2 before 12.2R1 allows remote attackers to inject arbitrary web script or HTML via unspecified parameters to index.php.
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Analysis
by VulDB Data Team • 05/10/2026
The CVE-2014-2712 vulnerability represents a critical cross-site scripting flaw in Juniper Junos J-Web interface across multiple software versions. This vulnerability resides within the web-based management console that administrators use to configure and manage Juniper network devices, making it particularly dangerous as it could be exploited by remote attackers to execute malicious code in the context of a victim's browser session. The vulnerability specifically affects versions prior to the listed security patches, including various release branches from 10.0S25 through 12.2R1, indicating a widespread impact across Juniper's product line during this timeframe.
The technical flaw stems from insufficient input validation and output encoding within the index.php script of the J-Web interface. Attackers can exploit this vulnerability by injecting malicious script code through unspecified parameters that are not properly sanitized or escaped before being rendered in web responses. This allows the malicious content to be executed in the browser context of authenticated users who visit the affected web interface, potentially leading to session hijacking, data theft, or further compromise of the network infrastructure. The vulnerability maps to CWE-79 - Improper Neutralization of Input During Web Page Generation, which is a fundamental weakness in web application security that enables XSS attacks.
The operational impact of this vulnerability extends beyond simple script injection, as it could enable attackers to perform privileged actions within the J-Web interface. An attacker who successfully exploits this vulnerability could potentially gain unauthorized access to network device configurations, manipulate routing tables, or even escalate privileges within the device management system. The attack surface is particularly concerning given that J-Web serves as the primary interface for network administrators to manage Juniper devices, making it a prime target for adversaries seeking persistent access to network infrastructure. This vulnerability aligns with ATT&CK technique T1059.007 - Command and Scripting Interpreter: JavaScript, and T1566.001 - Phishing: Spearphishing Attachment, as it enables the delivery of malicious JavaScript payloads that can compromise user sessions.
Mitigation strategies for CVE-2014-2712 require immediate implementation of software patches provided by Juniper to address the XSS vulnerability in affected J-Web versions. Organizations should also implement network segmentation to limit access to J-Web interfaces, enforce strong authentication mechanisms, and deploy web application firewalls to detect and prevent XSS attempts. Additionally, regular security audits of web-based management interfaces should be conducted to identify similar vulnerabilities, and network administrators should be trained to recognize and report suspicious web interface behavior. The vulnerability highlights the importance of input validation and output encoding practices in web applications, as specified in OWASP Top Ten 2017 category A03: Injection, which directly relates to the XSS attack vector present in this vulnerability.