Critical XSS vulnerability in Nextcloud Server versions before 9.0.58, 10.0.5, and 11.0.3. Learn about the impact, affected systems, exploitation, and mitigation steps.
Nextcloud Server versions prior to 9.0.58, 10.0.5, and 11.0.3 are vulnerable to XSS due to insufficient escaping of error messages.
Understanding CVE-2017-0891
There are critical security vulnerabilities in Nextcloud Server versions before 9.0.58, 10.0.5, and 11.0.3 that can lead to cross-site scripting (XSS) attacks.
What is CVE-2017-0891?
This CVE identifies XSS vulnerabilities in multiple components of Nextcloud Server versions prior to 9.0.58, 10.0.5, and 11.0.3. The issue arises from inadequate escaping of error messages.
The Impact of CVE-2017-0891
The vulnerability allows attackers to inject malicious scripts into web pages viewed by users, potentially leading to unauthorized access, data theft, and other malicious activities.
Technical Details of CVE-2017-0891
Nextcloud Server versions before 9.0.58, 10.0.5, and 11.0.3 are affected by this CVE.
Vulnerability Description
The XSS vulnerability stems from the lack of proper escaping of error messages within the affected versions of Nextcloud Server.
Affected Systems and Versions
Exploitation Mechanism
Attackers can exploit this vulnerability by injecting malicious scripts into error messages, which are then executed when viewed by users, leading to XSS attacks.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2017-0891.
Immediate Steps to Take
Long-Term Security Practices
Patching and Updates