CVE-2015-4245 in WebEx Training Center
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Cisco WebEx Training Center allows remote attackers to inject arbitrary web script or HTML via an unspecified value, aka Bug ID CSCut92274.
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Analysis
by VulDB Data Team • 06/03/2022
The CVE-2015-4245 vulnerability represents a critical cross-site scripting flaw discovered in Cisco WebEx Training Center software, which falls under the broader category of web application security weaknesses. This vulnerability specifically affects the handling of user-supplied input within the WebEx Training Center platform, creating a potential attack vector that could be exploited by remote threat actors to execute malicious code within the context of a victim's browser session. The vulnerability was identified through Cisco's internal security assessment processes and subsequently documented under Bug ID CSCut92274, highlighting the organization's ongoing efforts to maintain secure communication platforms for enterprise users.
The technical exploitation of this XSS vulnerability occurs when an attacker manipulates an unspecified input value that is not properly sanitized or validated by the WebEx Training Center application. When the application processes this malformed input without adequate security controls, it inadvertently incorporates the malicious script into the web page response delivered to legitimate users. This flaw typically manifests in the application's parameter handling or form processing mechanisms where user-controllable data is directly rendered in web responses without proper encoding or validation. The vulnerability's classification as a reflected XSS issue suggests that the malicious payload is embedded in a URL or HTTP request parameter and executed when the victim clicks on a crafted link or visits a malicious page, making it particularly dangerous for widespread exploitation within enterprise environments.
The operational impact of CVE-2015-4245 extends beyond simple data theft or session hijacking, as it provides attackers with the capability to perform various malicious activities within the context of authenticated user sessions. An attacker could potentially steal session cookies, redirect users to malicious websites, deface training center pages, or execute commands on behalf of legitimate users. Given that WebEx Training Center is widely used for enterprise training and collaboration, the compromise of a single user session could potentially lead to broader network infiltration or data exfiltration. The vulnerability particularly affects organizations that rely heavily on WebEx for educational purposes, corporate training, and remote collaboration, making it a prime target for advanced persistent threats seeking to establish long-term access to enterprise networks. This weakness directly violates the principle of input validation and output encoding that should be fundamental to secure web application development practices.
Organizations affected by this vulnerability should implement immediate mitigations including updating to Cisco's patched versions of WebEx Training Center software, implementing web application firewalls to detect and block malicious payloads, and conducting comprehensive security assessments of their WebEx implementations. Network segmentation and user access controls should be reviewed to limit the potential impact of successful exploitation. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and demonstrates how insufficient input validation creates opportunities for attackers to execute arbitrary code in user browsers. From an ATT&CK framework perspective, this vulnerability maps to techniques involving initial access through web application attacks and privilege escalation via session hijacking, making it a critical component of enterprise security defense-in-depth strategies. Regular security patch management and web application security monitoring should be prioritized to prevent similar vulnerabilities from being exploited in the future, particularly in collaborative platforms that handle sensitive enterprise data and user credentials.