CVE-2016-1498 in ownCloud
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the OCS discovery provider component in ownCloud Server before 7.0.12, 8.0.x before 8.0.10, 8.1.x before 8.1.5, and 8.2.x before 8.2.2 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors involving a URL.
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Analysis
by VulDB Data Team • 04/01/2025
The CVE-2016-1498 vulnerability represents a critical cross-site scripting flaw within the OCS discovery provider component of ownCloud Server, a widely deployed cloud storage and file sharing platform. This vulnerability affects multiple version branches including 7.0.12, 8.0.10, 8.1.5, and 8.2.2, indicating a prolonged exposure window that allowed malicious actors to exploit the weakness across various iterations of the software. The vulnerability specifically resides in how the system handles URL inputs within its discovery provider functionality, creating an attack surface that remote adversaries could leverage without requiring authentication or privileged access.
The technical nature of this vulnerability aligns with CWE-79, which categorizes cross-site scripting as a code injection flaw where untrusted data is improperly incorporated into web pages without proper validation or sanitization. The flaw manifests when the OCS discovery provider component processes URL parameters that contain malicious scripts or HTML content, allowing attackers to inject arbitrary web scripts that execute in the context of other users' browsers. This particular vulnerability demonstrates the classic characteristics of reflected XSS where the malicious payload is embedded in a URL and delivered to victims through social engineering or direct link sharing, bypassing traditional security controls that might otherwise prevent such attacks.
The operational impact of CVE-2016-1498 extends beyond simple data theft or session hijacking, as it provides attackers with the capability to manipulate user sessions, redirect victims to malicious sites, or execute persistent attacks against authenticated users within the ownCloud environment. The vulnerability's presence in multiple version lines suggests that organizations using affected ownCloud deployments were exposed to potential exploitation for extended periods, potentially allowing attackers to establish persistent footholds within cloud environments. The attack vector involving URL manipulation means that even a single compromised link shared within a collaborative environment could compromise multiple users, making this vulnerability particularly dangerous in enterprise settings where file sharing and collaboration are fundamental to operations.
Security professionals should consider this vulnerability in relation to ATT&CK framework's T1059.007 technique for script injection and T1566 for social engineering, as the attack chain typically involves crafting malicious URLs that exploit user trust in legitimate applications. Organizations affected by this vulnerability should prioritize immediate patching across all impacted ownCloud installations, implementing proper input validation and output encoding measures to prevent similar issues in the future. The vulnerability also highlights the importance of maintaining up-to-date software versions and implementing comprehensive security monitoring to detect anomalous URL patterns that might indicate exploitation attempts. Additionally, network segmentation and web application firewalls can provide additional defense-in-depth measures to mitigate the risk of successful exploitation while organizations await patch deployment.