CVE-2021-26628 : Security Advisory and Response
Learn about CVE-2021-26628 affecting MaxBoard, enabling XSS attacks and malicious file uploads. Understand the impact, technical details, and mitigation steps.
MaxBoard is affected by an XSS vulnerability that allows unauthorized users to steal admin privileges. This CVE also involves a file upload issue that permits remote attackers to upload malicious files disguised as images.
Understanding CVE-2021-26628
This vulnerability affects MaxBoard, a platform with insufficient script validation on the admin page, leading to XSS and insecure file uploads.
What is CVE-2021-26628?
CVE-2021-26628 is a security flaw in MaxBoard that enables cross-site scripting (XSS) attacks and allows attackers to upload arbitrary files posing as images.
The Impact of CVE-2021-26628
The impact of this CVE is significant, with a high CVSS base score of 8.1, affecting confidentiality, integrity, and potentially granting unauthorized admin privileges.
Technical Details of CVE-2021-26628
The vulnerability stems from insufficient file verification when uploading images on a specific menu, enabling remote attackers to upload malicious files.
Vulnerability Description
The flaw arises from the lack of proper validation on the admin page, enabling XSS attacks, and inadequate file verification allowing the upload of malicious files.
Affected Systems and Versions
MaxBoard version 1.9.6 and below on Linux platforms are affected by this vulnerability.
Exploitation Mechanism
Remote attackers can exploit this vulnerability by uploading malicious files cloaked as images, potentially leading to admin privilege escalation or remote code execution.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-26628, immediate steps must be taken to secure systems and prevent unauthorized access.
Immediate Steps to Take
Implement web application firewalls, sanitize user inputs, and conduct regular security audits to detect and prevent XSS and file upload vulnerabilities.
Long-Term Security Practices
Train users on safe browsing habits, keep software up to date, and deploy intrusion detection systems to monitor and block suspicious activities.
Patching and Updates
Apply security patches provided by MaxBoard promptly to address the XSS and file upload vulnerability and enhance overall system security.