CVE-2019-15619 : Exploit Details and Defense Strategies
Learn about CVE-2019-15619, an XSS vulnerability in Nextcloud Server 16.0.3, allowing attackers to execute malicious scripts. Find mitigation steps and preventive measures here.
An XSS vulnerability exists in Nextcloud Server 16.0.3, Nextcloud Talk 6.0.3, and Nextcloud Deck 0.6.5 due to inadequate neutralization of file names, conversation names, and board names, allowing exploitation when linked within a project.
Understanding CVE-2019-15619
This CVE identifies a Cross-site Scripting (XSS) vulnerability in Nextcloud Server and related components.
What is CVE-2019-15619?
CVE-2019-15619 is an XSS vulnerability in Nextcloud Server versions 16.0.3, Nextcloud Talk 6.0.3, and Nextcloud Deck 0.6.5 due to improper handling of certain names within a project.
The Impact of CVE-2019-15619
The vulnerability allows attackers to execute malicious scripts in the context of a user's session, potentially leading to unauthorized actions or data theft.
Technical Details of CVE-2019-15619
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The XSS vulnerability arises from the improper neutralization of file names, conversation names, and board names within the affected Nextcloud Server versions.
Affected Systems and Versions
- Product: Nextcloud Server
- Version: 16.0.4
Exploitation Mechanism
The vulnerability can be exploited by linking the vulnerable elements (file names, conversation names, and board names) within a project, allowing the injection of malicious scripts.
Mitigation and Prevention
Protecting systems from CVE-2019-15619 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update Nextcloud Server to a patched version that addresses the XSS vulnerability.
- Educate users about the risks of clicking on suspicious links or interacting with untrusted content.
Long-Term Security Practices
- Regularly monitor and audit web applications for security vulnerabilities.
- Implement input validation mechanisms to prevent XSS attacks.
Patching and Updates
Ensure timely installation of security patches and updates provided by Nextcloud to mitigate the XSS vulnerability.