CVE-2021-39344 : Exploit Details and Defense Strategies
Learn about CVE-2021-39344 affecting KJM Admin Notices plugin in Wordpress. Find out the impact, technical details, and mitigation steps for this authenticated stored cross-site scripting vulnerability.
KJM Admin Notices <= 2.0.1 Authenticated Stored Cross-Site Scripting vulnerability details and mitigation.
Understanding CVE-2021-39344
The KJM Admin Notices plugin for Wordpress is susceptible to Stored Cross-Site Scripting, potentially allowing attackers to inject arbitrary web scripts through certain parameters.
What is CVE-2021-39344?
The vulnerability arises due to inadequate input validation and sanitization in the ~/admin/class-kjm-admin-notices-admin.php file.
The Impact of CVE-2021-39344
The vulnerability affects versions up to and including 2.0.1, particularly in multi-site installations with disabled unfiltered_html for administrators.
Technical Details of CVE-2021-39344
Details about the vulnerability and affected systems.
Vulnerability Description
The vulnerability permits attackers with administrative user privileges to execute malicious scripts via specific plugin parameters.
Affected Systems and Versions
- Product: KJM Admin Notices
- Vendor: KJM Admin Notices
- Versions Affected: <= 2.0.1
Exploitation Mechanism
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: High
- CVE Score: 5.5 (Medium Severity)
Mitigation and Prevention
Steps to mitigate the CVE-2021-39344 vulnerability.
Immediate Steps to Take
- Uninstall the KJM Admin Notices plugin from Wordpress.
Long-Term Security Practices
- Regularly update Wordpress plugins and themes.
- Implement a web application firewall to prevent XSS attacks.
Patching and Updates
Stay informed about security updates for plugins and apply patches promptly.