CVE-2015-7795 in Office
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Cybozu Office 9.0.0 through 10.3.0 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors, a different vulnerability than CVE-2015-7796, CVE-2015-7797, CVE-2015-7798, CVE-2016-1149, and CVE-2016-1150.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 07/30/2018
The CVE-2015-7795 vulnerability represents a critical cross-site scripting flaw discovered in Cybozu Office versions 9.0.0 through 10.3.0, constituting a significant security weakness that enables remote attackers to execute malicious web scripts or HTML content within the context of affected applications. This vulnerability specifically affects enterprise collaboration platforms that utilize Cybozu Office as their core infrastructure, creating potential entry points for attackers to compromise user sessions and access sensitive organizational data. The flaw operates through unspecified vectors that differ from other contemporaneous vulnerabilities in the same product line, indicating a distinct attack surface that requires specific remediation approaches.
The technical implementation of this XSS vulnerability stems from insufficient input validation and output encoding mechanisms within the Cybozu Office application framework. Attackers can exploit this weakness by crafting malicious payloads that are subsequently executed in the browsers of unsuspecting users who interact with compromised application interfaces. The vulnerability's classification under CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') aligns with established web application security patterns where user-supplied data is inadequately sanitized before being rendered back to users. The affected versions demonstrate a pattern of inadequate security controls that fail to properly escape or validate dynamic content before presentation to end users.
Operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform session hijacking, steal sensitive information, manipulate application data, and potentially escalate privileges within the affected environment. The attack surface is particularly concerning for enterprise environments where Cybozu Office serves as a central collaboration platform, as successful exploitation could lead to unauthorized access to confidential business communications, employee data, and organizational resources. Organizations utilizing these vulnerable versions face increased risk of data breaches and compromised user trust, with potential regulatory implications depending on the nature of data processed through the affected systems.
Mitigation strategies for CVE-2015-7795 should prioritize immediate remediation through official vendor patches and updates, as the vulnerability requires comprehensive application-level fixes to address the underlying input validation deficiencies. Security teams should implement additional protective measures including web application firewalls, content security policies, and enhanced input sanitization routines to reduce exposure while awaiting official patches. The vulnerability's relationship to other CVE identifiers such as CVE-2015-7796 through CVE-2016-1150 demonstrates the importance of comprehensive vulnerability management and the need for thorough assessment of related security flaws within the same product ecosystem. Organizations should also consider implementing user education programs to recognize potential phishing attempts that might exploit similar XSS vectors and establish robust monitoring procedures to detect suspicious activities in affected applications. The ATT&CK framework categorizes this vulnerability under T1059.007 - Command and Scripting Interpreter: JavaScript, highlighting the execution techniques that attackers can leverage through such XSS vulnerabilities to compromise user sessions and execute malicious code within the targeted environment.