CVE-2021-20829 : Exploit Details and Defense Strategies
Learn about CVE-2021-20829, a cross-site scripting flaw in GROWI v4.2.19 and earlier versions, enabling remote attackers to execute malicious scripts on user browsers. Find mitigation steps and updates to prevent exploitation.
This article provides an overview of CVE-2021-20829, a cross-site scripting vulnerability found in GROWI versions v4.2.19 and earlier. Learn about the impact, technical details, and mitigation steps for this vulnerability.
Understanding CVE-2021-20829
CVE-2021-20829 is a security flaw in the GROWI software that allows remote attackers to execute arbitrary scripts via a specially crafted web page.
What is CVE-2021-20829?
The vulnerability arises from inadequate tag sanitization in GROWI versions v4.2.19 and earlier, enabling attackers to inject malicious scripts, potentially compromising user browsers.
The Impact of CVE-2021-20829
This vulnerability poses a significant risk as it allows threat actors to execute arbitrary scripts on the browsers of users visiting malicious web pages, leading to potential data theft or unauthorized access.
Technical Details of CVE-2021-20829
The following technical aspects highlight the vulnerability in detail.
Vulnerability Description
The cross-site scripting flaw in GROWI stems from the failure to properly sanitize tags, facilitating script injection by remote attackers.
Affected Systems and Versions
GROWI versions v4.2.19 and earlier are affected by this vulnerability, putting users of these versions at risk of script execution attacks.
Exploitation Mechanism
Remote threat actors can exploit this vulnerability by enticing users to visit specially crafted web pages, triggering the execution of malicious scripts in their browsers.
Mitigation and Prevention
To safeguard systems from CVE-2021-20829, immediate action and long-term security practices are essential.
Immediate Steps to Take
Users should refrain from visiting untrusted websites and ensure security updates for GROWI are promptly applied to mitigate the risk of script injection attacks.
Long-Term Security Practices
Implement robust security measures, including regular security audits, code reviews, and user input validation, to prevent cross-site scripting vulnerabilities like CVE-2021-20829.
Patching and Updates
Stay informed about security patches released by WESEEK, Inc. for GROWI and promptly apply all relevant updates to address vulnerabilities and enhance system security.